Chapter 1: Introduction to Anatomy and Physiology

Definitions and Overview

Anatomy and physiology are foundational sciences in understanding the human body. Anatomy focuses on the structure of body parts, while physiology examines their function.

• Anatomy: The study of the structure and relationships between body parts.

• Physiology: The study of how the body and its parts function.

• Example: Studying the heart's chambers (anatomy) and how blood flows through them (physiology).

Organ Systems Classification

Organ systems are groups of organs that work together to perform complex functions. They can be classified based on their major functions.

• Major Organ Systems: Examples include the digestive system (breaks down food), respiratory system (gas exchange), and nervous system (control and communication).

• Function-Based Classification: Systems may be grouped as support/movement (skeletal, muscular), control (nervous, endocrine), transport (cardiovascular, lymphatic), etc.

• Example: The urinary system removes waste from the blood and regulates water balance.

Anatomical Terms for Body Location

Precise anatomical terminology is used to describe locations and relationships of body parts.

• Directional Terms: Proximal (closer to the point of attachment), distal (farther from the point of attachment), superficial (toward the surface), medial (toward the midline), lateral (away from the midline).

• Example: The elbow is proximal to the wrist.

• Additional info: Anatomical position is the standard reference: body standing upright, facing forward, arms at sides, palms forward.

Body Cavities and Organs

The human body contains several major cavities that house organs.

• Dorsal Cavity: Contains the cranial cavity (brain) and vertebral cavity (spinal cord).

• Ventral Cavity: Includes the thoracic cavity (heart, lungs) and abdominopelvic cavity (digestive organs, reproductive organs).

• Example: The heart is located within the thoracic cavity.

Table: Major Body Cavities and Their Contents

Additional info: The study guide references "130 questions" and "multiple-choice" format, indicating this is a preparatory resource for exam review.