Anatomy refers to the structure of the body, meaning bones, muscles and tissues. Physiology is about how the body functions to maintain life.
Organization
The body is organized in levels that build on and affect one another. Cells create tissues, two or more different tissues work together to form an organ, and groups of organs with a common purpose form a system.
Support and Movement
The bones in the skeletal system support soft tissues, protect internal organs and create a structure that enables movement. Muscles are responsible for motion, the production of heat and maintenance of posture.
Control
Two systems control body functioning, the nervous system and the endocrine system. The nervous system includes the central nervous system (brain and spinal cord) and the autonomic nervous system. The endocrine system includes the glands that produce hormones: the pituitary, thyroid, pancreas, adrenals, pineal and gonads.
Balance
To function properly all functions in the body must stay in balance. This is maintained by the cardiovascular, lymphatic, respiratory, digestive and urinary systems.
Reproduction
This system is responsible for duplicating genetic material and nurturing its division and growth until another living human is reproduced.
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