Which term describes the delivery of fluid to a tissue through the circulatory system?

• A. Perfusion
• B. Circulation
• C. Osmosis
• D. Diffusion

Answer: (A)

Perfusion is the delivery of blood to tissue through the circulatory system, supplying oxygen and nutrients and removing wastes. It specifically describes how fluid reaches a tissue via the capillary network and supports cellular metabolism. Circulation refers to the overall movement of blood through the heart and vessels, not the tissue-level delivery itself. Osmosis is the movement of water across a membrane due to solute differences, and diffusion is the spread of molecules from higher to lower concentration. Neither of these describes the targeted delivery of fluid to tissues via the circulatory system the way perfusion does.