Introduction to the Human Body, Cells, and Tissues

Comprehensive vocabulary review flashcards covering anatomy fundamentals, cellular membrane dynamics, organelles, and tissue types based on lecture outlines.

Anatomy

The study of the structural components and subcategories of the human body.

Physiology

The study of biological functions and categories of the human body, directly linked to structure.

Homeostasis

The state of steady internal conditions maintained by living organisms through regulatory mechanisms.

Fedback loops

Biological control systems and pathways that regulate and maintain homeostasis.

Levels of Organization

The structural hierarchy of the human body, spanning from cellular components and tissues up through organ systems.

Organ systems of Human Body

Coordinated groups of organs that work together to perform complex physiological functions.

Anatomical Position

The standard reference orientation of the human body used to establish directional terms.

Directional terms

Terminology used to describe the relative positions and orientations of structures in reference to anatomical position.

Compartmentalization

The structural separation of the human body into distinct, enclosed internal spaces and cavities.

Post. & Ant. Cauities

The posterior and anterior cavities of the human body, which are partitioned into distinct anatomical subdivisions.

Abdominal Regions/Quadrants

Specific sectional schemes used to compartmentalize and reference areas within the abdominal cavity.

Serous Membranes

Thin, protective double-layered membranes lining closed internal body cavities.

Layers of a Serous Membrane

The distinct sheets that make up a serous membrane, including the parietal layer lining cavity walls and the visceral layer covering internal organs.

Cell Membrane

The selectively permeable outer boundary of a cell composed of a specialized lipid and protein structure.

Phospholipids (Amphipathic molecules)

Molecules possessing both hydrophilic and hydrophobic regions that form the fundamental bilayer structure of the cell membrane.

Passure Transport

The movement of substances across a cell membrane down their concentration gradient without the expenditure of cellular energy.

Diffusion

A form of passive transport involving the net movement of particles from an area of higher concentration to an area of lower concentration.

Osmosis

The passive transport and diffusion of water molecules across a selectively permeable membrane.

Active Transport

The energy-requiring movement of substances across a cell membrane, including transport via vesicles.

Endocytosis

A form of active bulk transport comprising three distinct forms that brings external materials into the cell via vesicles.

Exocytosis

A cellular active transport process in which intracellular vesicles fuse with the cell membrane to export materials out of the cell.

Endoplasmic Reticulum (ER)

A membranous organelle forming an interconnected network of flattened sacs and tubules involved in synthesis and transport.

Golg Apparatus

A membranous organelle that modifies, sorts, and packages proteins and lipids for transport.

Mitochondna

Double-membraned cellular organelles responsible for generating adenosine triphosphate (ATP) via cellular respiration.

Cytoskeletion

The dynamic internal network of protein filaments and tubules that provides structural support, shape, and transport within the cell.

Cell Surface Specializations

Distinct structural adaptations on the external surface of cells, such as microvilli or cilia, that facilitate specific functions.

Organization of the Nucleus

The structural compartmentalization of the cell nucleus, which encloses genetic material and nuclear components.

Nucleic Acids Found in Human Cells

The genetic polymers, primarily DNA and RNA, that store and transmit hereditary information in human cells.

Process of Translation

The cellular process wherein ribosomes synthesize polypeptide chains using the genetic code provided by mRNA.

Mitosis

The process of nuclear division in eukaryotic cells that produces two genetically identical daughter nuclei.

Cellular Differentiation

The developmental process by which unspecialized cells acquire distinct structural and functional specializations.

Tissues

Cooperative assemblies of similar cells and extracellular matrix organized into distinct functional types within the body.

Cells of Epithelia

Closely packed cellular units that form epithelial sheets covering body surfaces and lining internal cavities.

Simple savamos Epithelum

An epithelial tissue type composed of a single layer of flattened, scale-like cells adapted for diffusion and filtration.

Glands of Epithelia

Specialized epithelial structures adapted for the production and secretion of specific biochemical substances.

Cartilage

A flexible, non-vascular connective tissue type composed of chondrocytes and a specialized extracellular matrix.

Bone

A rigid, mineralized connective tissue that forms the skeletal framework, provides support, and protects organs.

Skeletal Muscle

Striated, voluntary muscle tissue characterized by multinucleated fibers attached to the skeleton.

Cardiac Muscle

Striated, involuntary muscle tissue found exclusively in the heart wall, characterized by branching fibers and intercalated discs.

Smooth Muscle

Non-striated, spindle-shaped, involuntary muscle tissue located in the walls of internal organs and blood vessels.

Neurons & Nervous Tissue

Excitable signaling cells and supporting neuroglia that initiate, conduct, and transmit electrical impulses throughout the body.

Inflammation

A localized biological response of body tissues to harmful stimuli, injury, or infection.

Tissues & Cancer

The pathological disruption of normal tissue organization characterized by uncontrolled cell proliferation and invasion.