Introduction to Anatomy and Physiology

Importance of Anatomical Terminology

Understanding and using correct anatomical terminology is essential for clear communication among health science professionals. Mastery of this language ensures accuracy in describing locations, relationships, and functions of body structures.

Form and Function: Anatomy & Physiology

Definitions

• Anatomy: The study of the structure of body parts and their relationships to one another.

• Physiology: The study of the function of body parts; specifically, how they work to carry out life-sustaining activities.

These two disciplines are closely linked, as the structure of a body part often determines its function.

Divisions of Anatomy

Gross (Macroscopic) Anatomy

• Gross or Macroscopic Anatomy: Study of large, visible structures.

• Regional Anatomy: Examines all structures in a particular area of the body (e.g., the abdomen or leg).

• System Anatomy: Focuses on one system at a time (e.g., cardiovascular, nervous, muscular).

• Surface Anatomy: Studies internal structures as they relate to the overlying skin surface (e.g., visible muscle masses or veins).

Microscopic Anatomy

• Microscopic Anatomy: Deals with structures too small to be seen with the naked eye.

• Cytology: The study of cells.

• Histology: The study of tissues.

Developmental Anatomy

• Developmental Anatomy: Studies anatomical and physiological development throughout life.

• Embryology: The study of developmental changes before birth.

Divisions of Physiology

• Organ System-Based Physiology: Focuses on specific organ systems (e.g., renal physiology, cardiovascular physiology).

• Cellular and Molecular Physiology: Examines how the body's abilities depend on chemical reactions in individual cells.

To study physiology, one must understand basic physical (e.g., electrical currents, pressure, movement) and chemical principles.

Complementarity of Structure and Function

Principle of Complementarity

• Structure and function are inseparable: What a structure can do depends on its specific form.

• This is known as the principle of complementarity of structure and function.

Example: The sharp edges of incisors make them ideal for cutting (structure matches function), while the flat surfaces of molars are suited for grinding food.