Essentials Of Anatomy And | Physiology

: Molecules form the basic functional units of life— cells .

The human body is organized into a hierarchy of increasing complexity: Essentials of Anatomy and Physiology

: Supports and binds body parts (e.g., bone, blood). Muscle : Enables movement through contraction. Nervous : Transmits electrical impulses for communication. : Molecules form the basic functional units of life— cells

: Two or more tissue types working together (e.g., the stomach uses muscle, epithelial, and nervous tissue to digest food). Nervous : Transmits electrical impulses for communication

: Groups of similar cells that perform a specific function. The four primary types are: Epithelial : Covers surfaces and lines organs.

: Related organs coordinating for a common purpose (e.g., the digestive system).

Essentials of Anatomy and Physiology is the integrated study of the human body's structure () and how those structures function ( physiology ) to sustain life. The core principle of this field is the complementarity of structure and function , meaning the physical form of a body part is intrinsically linked to the tasks it performs. I. Levels of Structural Organization