Chapter 1 Slides - Anatomy

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  • Second Edition of Anatomy & Physiology Essentials

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Section 1: Foundations of Human Anatomy and Physiology

1.1 Terminology for Anatomy and Physiology

  • Objectives:

    • Explain relationship between anatomy and physiology

    • Identify and define word parts making up medical terms

    • Use medical terminology to describe body locations, planes, and movements

Anatomy and Physiology Definitions

  • Anatomy: Study of form or structure, including:

    • Gross Anatomy: Structure that can be seen with the naked eye

    • Microscopic Anatomy: Cells and tissues observed under a microscope

  • Physiology: Study of function and processes

    • Involves Comparative Anatomy and Comparative Physiology for various species

Anatomy-Physiology Relationship

  • Each system contributes unique capabilities

  • Understanding normal anatomy aids in grasping dysfunction and disease

Medical Terminology Components

  • Four types of word parts:

    • Root: Core meaning

    • Prefix: Beginning modifier

    • Suffix: Ending modifier

    • Combining Vowel: Usually 'o', facilitates pronunciation

Describing Anatomical Locations

  • Anatomical Position: Standard body position used as reference

  • Planes of the Body:

    • Sagittal Plane: Divides body into left and right

    • Frontal Plane: Divides body into anterior (front) and posterior (back)

    • Transverse Plane: Divides body into superior (top) and inferior (bottom)

Common Directional Terms

  • Superior (Cranial): Closer to the head

  • Inferior (Caudal): Away from the head

  • Anterior (Ventral): Toward the front of the body

  • Posterior (Dorsal): Toward the back of the body

  • Medial: Toward the midline

  • Lateral: Away from the midline

  • Proximal: Closer to the trunk

  • Distal: Away from the trunk

  • Superficial: Toward the surface

  • Deep: Away from the surface

Abdominal Quadrants

  • Right Upper Quadrant: Houses organs like the liver

  • Left Upper Quadrant: Contains the stomach

  • Right Lower Quadrant: Includes appendix

  • Left Lower Quadrant: Contains intestines

Body Regions and Cavities

  • Body regions named after underlying structures

  • Common cavities:

    • Cranial: Houses the brain

    • Thoracic: Houses the heart and lungs

    • Abdominal: Includes digestive organs

Section 1.2 Organization of the Body

Objectives

  • Explain how building blocks from atoms to organisms are organized

  • Identify human organ systems and their basic functions

Anatomical Building Blocks

  • Atoms serve as the foundational units of matter

  • Combine to form molecules, cells, tissues, organs, and systems

Overview of Organ Systems

  • Integumentary: Protects and regulates body temperature

  • Skeletal: Provides structure and support

  • Muscular: Facilitates movement

  • Nervous: Controls body functions through signals

  • Endocrine: Regulates body functions through hormones

  • Cardiovascular: Transports nutrients and waste

  • Respiratory: Provides gas exchange

  • Digestive: Processes food and absorption

  • Urinary: Regulates fluids and electrolyte balance

  • Reproductive: Responsible for generational propagation

    • Male and Female structures discussed

Section 1.3 Physiological Processes

Objectives

  • Identify physiological processes that sustain life

  • Define homeostasis and its maintenance mechanisms

Key Physiological Processes

  • Metabolism: Includes all chemical reactions in body cells

    • Anabolism: Building up (e.g., photosynthesis)

    • Catabolism: Breaking down (e.g., cellular respiration)

    • Metabolic Rate: Speed of energy consumption, affected by physical activity and maintenance of life functions

Homeostasis

  • Maintained through interactions of various body systems

  • Characterized by:

    • Receptors: Detect changes

    • Control Center: Analyzes and responds

    • Effectors: Execute responses

  • Negative Feedback: Mechanism to return to set limits (e.g., body temperature regulation)

  • Positive Feedback: Amplifies processes (e.g., childbirth contractions)

Section 1.4 Effects of Physical Forces on the Body

Objectives

  • Explain kinetic concepts: force, mass, weight, pressure, torque

  • Identify external forces on human body and injury factors

Kinetics

  • Examination of forces impacting the human body

  • Mass: Quantifies matter; increases proportionally with weight

  • Center of Gravity: Where weight is balanced

  • Torque: The tendency of forces to cause rotation

Forces and Injury

  • Injury determined by:

    • Size

    • Direction

    • Application point

    • Duration of force application

  • Stress: Results from force distribution within the body

  • Types of Forces: Compression, tension, shear effects discussed

  • Distinction between acute vs. repetitive injury mechanisms.