Tag: physiology
- Circulatory System Structure ()
The heart is a muscular pump that provides the force necessary to circulate the blood to all the tissues in the body. Its function is vital because, to survive, the tissues need a continuous supply of oxygen and nutrients, and metabolic waste products have to be removed. Deprived of these necessities, cells soon undergo irreversible […]
- Anatomical Terms ()
Directional terms Directional terms describe the positions of structures relative to other structures or locations in the body. Directional terms are used solely for comparison. Superior or cranial – toward the head end of the body; upper (example, the hand is part of the superior extremity). Inferior or caudal – away from the head; lower […]