The term for circulation of blood within an organ or tissue in adequate amounts to meet the cells' oxygen, nutritional, and waste-removal needs is called:

• A. perfusion
• B. coagulation
• C. hemorrhage
• D. hypoperfusion

Answer: (A)

Perfusion is the circulation of blood through an organ or tissue at a rate that meets the cells’ oxygen, nutrient, and waste-removal needs. This delivery of oxygen and nutrients via the bloodstream and the removal of wastes are essential for cellular metabolism and tissue function. When perfusion is adequate, cells can respire and stay healthy; when it drops, tissues can become hypoxic and dysfunction can occur.

Coagulation refers to clot formation, which can block flow but isn’t the definition. Hemorrhage is bleeding and represents loss of blood volume. Hypoperfusion means insufficient blood flow to meet tissue demands, which is the opposite of adequate perfusion.