Intro to Anatomy and Physiology - Vocabulary Flashcards

Course Logistics and Course Goals

The course is fully online; in-person components like palpation may be limited or vary by class.
Weekly quizzes; a midterm and a final exam; marking is straightforward (quizzes to keep you on top of material; not to be overly punitive).
Zoom used for lectures; recordings and slide links provided; you’ll also have access to lecture videos and external resources (e.g., YouTube visual aids).
There was a temporary, irrelevant confusion about an old 2020-23 syllabus in the transcript; ignore that piece.
You’ll have books (hard copy and electronic options); access to slides via email if you’ve purchased the school books (per school rules).
Emphasis on integrating anatomy with practical clinical perspectives common to acupuncture and TCM: anatomy/physiology form the foundation for understanding pathology, symptoms, and treatment approaches.
Resources include visual videos (e.g., Crash Course) and YouTube content to complement reading; actual exam questions will be drawn from the slides and core concepts.
The instructor stressed collaboration: connect with classmates for study and understanding, particularly for the muscular system where there’s a lot of content.
The course includes a blend of basic sciences (anatomy, physiology) and clinical contexts (pain management, internal medicine, women’s health, pediatrics) as part of ACU programs.
Language in anatomy uses a mix of Latin/Greek terms; spelling is mostly MCQ-friendly, but understanding the terms and their roots helps with recall and clinical reasoning.
The instructor encouraged following the slide scope for quizzes and exploring rabbit holes only if you’re curious, not for exams.
The course will touch on the body as an integrated system; you’ll learn how systems interact (e.g., how the heart depends on lungs, hydration, and oxygenation).

What is Anatomy and What is Physiology?

Anatomy: study of the structure and parts of the body; macroscopic (visible) and microscopic (under a microscope) perspectives.
Physiology: study of how those structures function and interact in living systems.
The two disciplines are complementary: structure implies function; function explains structure.
Example: Shoulder pain can involve shoulder muscles, back muscles, connective tissue, and even organs via referred pain connections; requires holistic/systemic thinking rather than a single local cause.
The course frames anatomy as both regional and systemic, depending on approach; neither approach is “the only” correct way.
Foundational idea: holism in medicine — systems interconnect and affect one another.
The course emphasizes applying anatomy and physiology from a clinical, sometimes integrative (TCM/naturopathic) perspective.

Hierarchy of Organization and Homeostasis

Hierarchy from small to large: atoms → molecules → cells → tissues → organs → organ systems → the body as a whole.
Basic unit of life: the cell; cells combine to form tissues; tissues form organs; organs form systems; systems form the body.
Homeostasis: the steady-state balance of materials and energy within narrow ranges; not a perfect equilibrium but a dynamic balance.
Yin/Yang analogy: daily fluctuations in body processes (e.g., temperature, fluids, heart rate) reflect continual balancing.
Homeostasis is the main driver of survival; loss of homeostasis leads to organ failure and death in extreme cases.
Metabolism as a constant breakdown and build-up process; two core activities:
- Catabolism: breakdown of complex molecules into simpler ones, releasing energy.
- Anabolism: synthesis of complex molecules from simpler ones, requiring energy.
ATP as the body’s energy currency; energy from catabolism powers anabolic processes and cellular functions.
Practical metabolic statement: energy for cellular processes comes from ATP generated via catabolism of nutrients; continuous energy flux sustains life.
Basic normal ranges mentioned: textbook normal blood pressure around $120/80 ext{ mmHg}$ ; temporary fluctuations to values like $125/85$ or $115/80$ or $115/75$ can occur with activity.
The role of homeostasis in clinical reasoning: maintain temperature, fluids, heart rate, respiration, pH, and other constants within acceptable ranges.

Body Directions, Anatomical Position, and Planes

Anatomical position: standing erect, feet forward, palms forward (anatomical landmarks standardize descriptions).
Directional terms (relative to anatomy, not motion):
- Anterior (ventral) vs. Posterior (dorsal)
- Superior (cephalic) vs. Inferior (caudal)
- Medial vs. Lateral (toward/m away from midline)
- Proximal vs. Distal (toward/away from the trunk)
Conceptual note: these terms describe relationships between structures and are used to map the body in three dimensions; apply consistently for clarity (e.g., heart is anterior to the spine; kidneys are posterior to the stomach).
Planes of division (how the body can be sliced conceptually):
- Frontal/Coronal plane: front and back sections
- Sagittal plane: left and right sections; midsagittal is exactly in the middle; parasagittal is off-center
- Transverse (Horizontal) plane: top and bottom sections
Planes are widely used in histology and imaging to understand tissue organization and cross-sections.

Body Cavities and Spatial Organization

Major body cavities: dorsal (posterior) and ventral (anterior).
Dorsal cavity includes: cranial cavity (brain) and vertebral canal (spinal cord).
Ventral cavity is subdivided by the diaphragm into:
- Thoracic cavity (above the diaphragm): mediastinum, pericardial cavity, and pleural cavities for lungs; pleural cavities enclose lungs; pericardial cavity encloses heart; mediastinum contains major vessels and the heart region.
- Abdominopelvic cavity (below the diaphragm): abdominal cavity (stomach, liver, spleen, intestines, pancreas, etc.) and pelvic cavity (reproductive organs, bladder, some internal reproductive structures).
Serous membranes and their layers:
- Parietal layer lines the cavity walls; visceral layer covers the organs.
- Serous fluid between layers reduces friction during organ movement.
- Names reflect location relative to walls vs. organs (e.g., pleura for lungs, pericardium for heart, peritoneum for abdominal organs).
Mucous membranes line tracts that open to the exterior (respiratory, digestive, urinary, reproductive); they produce mucus to trap particles and protect underlying tissues; cilia help move mucus and trapped particles out of airways.
Cutaneous membrane: the skin; protective outer barrier.
Abdominal regional terminology (tic-tac-toe/9 regions or quadrants) used to locate pain and pathology; common descriptors include:
- Epigastric (above the stomach)
- Umbilical (around the belly button)
- Hypogastric (below the stomach)
- Right/Left hypochondriac, lumbar, iliac regions (right/left ilia for lower abdominal/hip areas)
Practical clinical use: describing pain location helps infer possible underlying organs and systems (e.g., right hypochondriac region and liver issues; right iliac region and appendix concerns).

Cells: The Basic Unit of Life

The cell is the basic unit of life with key features: organization, metabolism, responsiveness, homeostasis, growth, reproduction.
Cells form tissues, which form organs, which form organ systems.
The human body contains trillions of cells; the exact count varies by source, but conceptually it is vast and highly organized.
Core organelles and components (typical animal cell):
- Nucleus: genetic material; control center for replication and transcription
- Mitochondria: energy production (powerhouse)
- Golgi apparatus: protein processing and trafficking
- Endoplasmic reticulum (rough and smooth): protein synthesis and lipid metabolism
- Cytoplasm: intracellular fluid; site of many metabolic processes
- Peroxisomes and lysosomes: breakdown of waste; immune/defense roles
- Centrioles: cell division organization
- Cilia: movement of fluids over cell surfaces
Plasma (cell) membrane: a phospholipid bilayer that encloses the cell; functions include selective permeability, barrier to the external environment, communication with other cells via receptors, and transport via channel proteins, carriers, and pumps.
Microvilli: projections that increase surface area for absorption (e.g., intestinal lining, kidney tubules).
Stem cells and differentiation:
- Embryonic development shows stem cells differentiating into specialized cell types that form tissues.
- Some tissues (e.g., liver) regenerate well due to abundant stem cells; others (e.g., nervous tissue, cardiac tissue) regenerate poorly.
- Tissues have stem cell populations that enable turnover and repair; turnover rates vary by tissue type.
Tissue turnover and regeneration implications:
- Epithelium and connective tissues tend to regenerate relatively well.
- Nervous tissue has limited regenerative capacity; heart muscle (cardiac) is also limited.
- Liver exemplifies robust regenerative capacity.

Tissues and Their Four principal Types

Nervous tissue: controls and communicates; composed of neurons and glial cells; central nervous system (CNS) and peripheral nervous system (PNS).
Muscle tissue: contracts to produce movement; three types:
- Skeletal muscle: voluntary, striated, multinucleated; attaches to bones; responsible for body movement and posture
- Cardiac muscle: involuntary, striated, branched with intercalated discs; forms heart walls; rhythmic contractions
- Smooth muscle: involuntary, non-striated; lines hollow organs and vessels; moves substances through systems (e.g., GI tract, bladder)
Epithelial tissue: covers and lines surfaces; forms glandular tissue; avascular; supported by basement membrane; highly diverse shapes and layers
Connective tissue: supports and connects; diverse types including loose and dense connective tissue, adipose tissue, cartilage, bone, and blood; contains extracellular matrix components (collagen, elastic fibers, fibroblasts)
Basic organization: tissues form organs; organs form systems that coordinate to sustain life.
Fascia and connective tissue organization: connective tissue provides structure and cushioning; fascia surrounds muscles and organs, contributing to movement and protection.

Epithelial Tissue: Structure and Function

Epithelial tissue forms the linings and coverings of surfaces and cavities; two major categories:
- Proper epithelium (covers outside and lines internal surfaces)
- Glandular epithelium (forms glands for secretion)
Key characteristics:
- Avascular (receives nutrients from underlying tissues)
- Polarized cells with apical (top) and basal (base) surfaces; anchored to basement membrane
- Tight packing of cells provides a barrier; selective permeability
Shapes (descriptions describe both form and function):
- Squamous: flat cells; suitable for diffusion and filtration (e.g., alveolar walls, endothelium)
- Cuboidal: cube-shaped; typically involved in secretion/absorption (e.g., ducts, kidney tubules)
- Columnar: tall and slender; supports absorption/secretion (e.g., GI tract lining)
Layering (how many cell layers):
- Simple epithelium: single layer; ideal for absorption and diffusion (e.g., intestinal lining, some respiratory epithelia)
- Stratified epithelium: multiple layers; protective roles (e.g., skin, esophageal lining)
- Pseudostratified epithelium: appears multi-layered but is actually a single layer with nuclei at different heights; often ciliated (e.g., respiratory tract)
Specific examples and implications:
- Simple columnar epithelium lines the stomach and intestines and can include goblet cells and microvilli for absorption and secretion.
- Stratified squamous epithelium provides protection (e.g., skin, oral mucosa).
- Transitional epithelium (e.g., bladder) varies in shape and thickness to accommodate stretching and recoil.
Glands:
- Endocrine glands: secrete hormones directly into the bloodstream; no ducts
- Exocrine glands: secrete into ducts that carry secretions to surfaces or cavities (e.g., sweat, mucus, digestive enzymes)
Practical notes:
- Gland products can be hormones (endocrine) or enzymes/mucus/etc. (exocrine)
- Epithelial cells are rapid regenerators; high turnover areas (skin, mouth, gut) show rapid renewal; exposure to toxins (e.g., chemotherapy) shows why GI lining is particularly affected.

Connective Tissue and Fascia

Connective tissue provides structural support and binding between tissues; it is found throughout the body and includes ECM components (water, fibers, minerals).
Major types include: loose connective tissue, dense connective tissue, adipose tissue, cartilage, bone, and blood.
Roles:
- Structural support and framework for the body
- Cushioning and insulation (adipose tissue)
- Energy storage (fat)
- Protection and immune defense through resident cells and extracellular components
Fascia: a specialized connective tissue that envelops muscles and other organs; provides mechanical protection and facilitates movement by reducing friction between muscles.
Key components and properties:
- Collagen fibers provide tensile strength; elastic fibers provide stretch
- Adipose tissue stores fat; cushion and insulate
- Connective tissue types vary in density and organization (dense vs. loose)
Functional implications:
- Connective tissue contributes to the “scaffolding” of the body; without it, the body would lack its shape and integrity.

Muscular Tissue: Types and Characteristics

Skeletal muscle:
- Voluntary control; striated appearance; multinucleated cells
- Functions: movement, posture, facial expression, heat generation
Cardiac muscle:
- Involuntary control; striated;branched with intercalated discs; typically single nucleus
- Forms the myocardium; rhythmic contractions regulated by intrinsic pacemaker activity
Smooth muscle:
- Involuntary control; non-striated; spindle-shaped cells
- Found in walls of hollow organs (GI tract, blood vessels, bladder, uterus)
- Functions: move contents through organ systems (peristalsis, constriction)
Histology cues for identification (in practice):
- Skeletal: long cylindrical cells, obvious striations, multiple nuclei
- Cardiac: striated, branching fibers, intercalated discs, typically one nucleus per cell
- Smooth: non-striated, spindle-shaped cells, single nucleus, arranged in sheets

Nervous Tissue

Neurons: primary excitable cells that generate and conduct electrical impulses; basic components include the soma (cell body), dendrites (input), and axon (output).
Glial cells: support cells for neurons (insulation, protection, nourishing). They outnumber neurons and play multiple supportive roles.
Central Nervous System (CNS): brain and spinal cord.
Peripheral Nervous System (PNS): nerves throughout the body.
Functions: sensing stimuli, transmitting signals, coordinating responses; nervous system integrates with endocrine system via neuroendocrine signaling.

Membranes: Serous, Mucous, and Cutaneous

Membranes are thin sheets of tissue that cover surfaces, partition spaces, and enclose organs; they help with protection, lubrication, and structuring.
Serous membranes (serosa): line closed ventral cavities and fold over to cover organs; layers include parietal (wall) and visceral (organ) layers, with a potential fluid space in between to reduce friction.
- Pleura: serous membrane around the lungs
- Pericardium: serous membrane around the heart
- Peritoneum: serous membrane lining the abdominal cavity and covering abdominal organs
Mucous membranes: line the passages that open to the exterior (nose, mouth, digestive, urinary, reproductive tracts); produce mucus to trap particles and protect surfaces; cilia help move mucus.
Cutaneous membrane: the skin; protective outer barrier.
Mesothelium: specialized simple layer of serous membranes (the cells lining serous membranes).
Clinical and functional notes:
- Mucous membranes and cilia in the respiratory tract are critical for clearing inhaled particles and pathogens.
- Serous membranes reduce friction and allow smooth movement of internal organs.

Histology: Past and Present Context (High-Level)

Histology studies tissues under the microscope using stains/dyes to reveal cellular structures (nuclei, cytoplasm, fiber types).
History highlights (from Crash Course histology excerpt):
- Early microscopes by Leuwenhoek revealed tiny features; higher magnification (up to ~270x) enabled cellular detail.
- Staining techniques (e.g., carmine) after fixation and sectioning allowed visualization of cell components and neural tissues.
- The development of histology helped identify nervous tissue structure (neurons and glial cells) and tissue organization.
Functional takeaways from histology for anatomy:
- Tissue types determine organ function and disease; e.g., epithelial shape/layering relates to protective barriers vs. absorptive surfaces.
- Understanding tissue composition aids in recognizing how organs heal or fail after injury.

Metabolism, Diet, and Homeostasis (Broader Context)

Catabolism and anabolism are ongoing cellular processes; metabolism is the body's way of breaking down nutrients to release energy and then using that energy to build new cellular components.
ATP as the energy currency of cells; synthesis and use of ATP drive contraction, signaling, and biosynthesis.
Homeostasis keeps physiological variables within a narrow, functional range for survival; disruptions can lead to disease or death if not corrected.
Energy flow example (conceptual): Nutrients -> catabolism -> ATP -> anabolic processes (growth, repair, storage).
Practical clinical tie-in:
- Understanding metabolism helps explain why energy needs must be met for tissue repair, immune function, and organ function.
- Hormonal regulation (endocrine system) helps coordinate metabolism, growth, and stress responses.

Endocrine and Circulatory-Immune Context

Endocrine glands: ductless; secrete hormones into the bloodstream to regulate distant targets; examples include pituitary, thyroid, adrenal glands.
Exocrine glands: secrete into ducts to a body surface or cavity (e.g., sweat glands, salivary glands, digestive enzymes from the pancreas via ducts).
Glandular interaction with the nervous system: hormones circulate in the blood to reach target tissues; signaling is slower than neural signaling but has widespread effects.
Circulatory system: heart, blood vessels, and blood; delivers oxygen and nutrients, removes wastes, and supports immune surveillance.
Lymphatic system: immune defense; lymph nodes, spleen, thymus, and lymphatic vessels; also assists fat absorption via chyle in digestion.
Respiratory system: gas exchange; oxygen delivery to blood and carbon dioxide removal; interrelated with cardiovascular system for tissue oxygenation.

Abdominal Regions, Abdominopelvic Organization, and Pain Localization

Abdominal pain localization uses regions to infer potential organ involvement:
- Epigastric (above stomach)
- Umbilical (around belly button)
- Hypogastric (below stomach)
- Right/Left hypochondriac (near upper ribs)
- Right/Left lumbar (near flanks)
- Right/Left iliac (lower sides, near pelvis)
The tic-tac-toe (nine-region) division helps pinpoint pain and pathology more precisely than quadrants.
Practical clinical application: localization can guide hypotheses about liver, gallbladder, stomach, intestines, bladder, and reproductive organs involvement; e.g., right hypochondriac region and liver concerns; right iliac region and appendix.

Practical Quiz and Exam Preparation Guidance

Quizzes: closed-book; practice indicates the exam will emphasize terminology and conceptual understanding rather than memorization of all details.
Focus areas for quizzes:
- Basic system roles (protection, support, movement, coordination)
- Definitions: catabolism, anabolism, ATP, homeostasis
- Anatomical directions and planes (anterior/posterior, superior/inferior, medial/lateral, proximal/distal, sagittal/coronal/transverse)
- Planes of division and body cavities
- Epithelial tissue shapes and layering; gland types (endocrine vs. exocrine)
- Basic tissue types and muscle types (skeletal, cardiac, smooth) and whether they are voluntary or involuntary
- Membranes (serous, mucous, cutaneous) and their layers (parietal vs. visceral)
Quiz logistics:
- Usually around 20 questions; 30 minutes; results visible immediately
- Some questions may be reviewed post-hoc if a question is found ambiguous; possible mark adjustments
- No open-book quizzes; extra time accommodations available through school processes if needed
Study strategy:
- Stick to slide content for the quizzes; explore additional material only if you’re curious, not mandatory for the exam
- Watch complementary videos for visualization; use them to reinforce the slide material
Final study tip: practice using the anatomical vocabulary in context; this helps with both recall and clinical reasoning.

Quick Reference: Key Terms and Concepts (Condensed)

206 bones in the human adult skeleton; skeletal system provides structure and protection; muscles attach across joints to enable movement.
The skin is the integumentary system; protects against environment and participates in sensation and thermoregulation.
Nervous vs. endocrine control:
- Nervous system: fast, electrical signaling; central and peripheral components; coordinates short-term responses
- Endocrine system: slower, hormonal signaling via bloodstream; regulates long-term processes like metabolism and growth
Cardiorespiratory integration: heart and lungs work together to oxygenate blood and remove CO2; the brain requires blood flow; dehydration and electrolyte balance affect system performance.
Digestive system: open to exterior along the GI tract; digestion converts large macromolecules to absorbable units; liver, gallbladder, and pancreas assist digestion.
Urinary system: kidneys filter blood to remove toxins and regulate fluid balance; urine flows through ureters to bladder and out via urethra.
Reproductive system: sex organs and associated hormones; primary role in reproduction; many components discussed at a high level in this introduction.
Epithelial tissue: shapes (squamous, cuboidal, columnar) and layering (simple, stratified, pseudostratified); polarized with apical and basal surfaces; avascular; forms membranes and glands.
Glands: endocrine (hormone secretion into blood) vs. exocrine (secretions via ducts to surfaces or cavities).
Connective tissue and fascia: structural support; variety of densities; adipose tissue provides cushioning and energy reserve; fascia supports muscle groups.
Muscular tissue: skeletal (voluntary, striated), cardiac (involuntary, striated, intercalated discs), smooth (involuntary, non-striated).
Serous membranes: parietal and visceral layers; serous fluid reduces friction; examples include pleura, pericardium, and peritoneum.
Histology context: staining and microscopic visualization enable tissue identification and understanding of cellular organization; nerve tissue, muscle tissue, and glandular tissue each have distinctive histological features.

Notes on Real-World Relevance and Ethical/Philosophical Perspective

The teacher emphasized the integration of Western anatomical science with TCM concepts (e.g., yin/yang balance, chi) to foster a holistic clinical approach while maintaining a rigorous anatomical foundation.
Understanding human anatomy supports not only pathology and diagnostics but also safe and effective clinical practice in acupuncture and related medical fields.
The course highlights the importance of accurate anatomical language for patient communication and surgical planning; clear, standardized terms reduce mistakes and improve outcomes.
The history of anatomy (dissection, histology) underlines ethical considerations in medical education and the evolution of educational resources and consent processes for cadaveric study.
Practical implication: knowledge of tissue turnover and regenerative capacity informs prognosis and management after injuries or medical therapies (e.g., chemotherapy affecting rapidly turning-over GI epithelium).

Summary of Core Equations and Numeric References (LaTeX)

Number of bones: $206$
Blood pressure example range: $120/80 ext{ mmHg}$ (typical); variations such as $125/85$ , $115/80$ , or $115/75$ noted as normal fluctuations
ATP as the energy currency: conceptually, catabolic breakdown yields ATP which powers anabolic processes; a concise formal equation is context-dependent but can be represented as a general energy flow: Nutrients + O2
ightarrow CO2 + H2O + ext{ATP (energy)}
Atomic scale reference from Crash Course: approximately $7 imes 10^{27}$ atoms in the human body (contextual figure from the video excerpt)
Other scale references described in Crash Course and historical notes (e.g., magnification up to ~270x for early histology; cell sizes on the order of micrometers for RBCs; neurons span long distances in the body)

Quick Actionable Checklist for Studying Anatomy (Based on Lecture Focus)

Memorize key directional terms and planes:
- Anterior/Posterior; Superior/Inferior; Medial/Lateral; Proximal/Distal; Sagittal/Coronal/Transverse
Be able to describe the major body cavities and their contents:
- Dorsal: Cranial and Vertebral
- Ventral: Thoracic (heart, lungs) and Abdominopelvic (digestive and reproductive organs)
Understand the four tissue types and their basic functions; know the three muscle types and which are voluntary/involuntary
Grasp epithelial tissue shapes and layers; differentiate simple vs. stratified vs. pseudostratified; connect shape/layering to function
Recognize serous vs. mucous membranes and the concept of parietal vs. visceral layers
Recall metabolic concepts: catabolism vs. anabolism; ATP as energy currency; homeostasis as a functional target
Apply anatomical language to simple clinical scenarios (e.g., pain location, organ relationships, channel pathways in TCM context)
Watch recommended videos to reinforce visuals and terminology; use the slides as your primary study guide for quizzes

Note on Course Format and Accessibility

Quizzes are closed-book and designed to assess understanding of the material presented on slides.
Immediate feedback on quiz results is typical; instructors may adjust questions after review.
If language or time barriers exist, accommodations can be arranged through the school and instructor.
The course encourages cross-talk with classmates to deepen understanding, especially for complex topics like the muscular system.