Perfusion refers to which process?

Perfusion refers to which process?

• A. The delivery of blood to a capillary bed
• B. The removal of waste from capillaries
• C. The return of blood to the heart via veins
• D. The mixing of blood in the chambers

Answer: (A)

Perfusion is the flow of blood through the capillary networks of a tissue, enabling exchange at the cellular level. It describes delivering oxygen and nutrients to the tissue and carrying away carbon dioxide and wastes. The best description is the delivery of blood to a capillary bed, because it is through that capillary network that nutrients reach cells and wastes are removed. The other options describe related processes but not perfusion itself: removing waste from capillaries is part of exchange rather than the act of delivering blood to tissue; returning blood to the heart via veins is venous return; mixing of blood in the chambers relates to cardiac mixing, not tissue perfusion.

Perfusion is the flow of blood through the capillary networks of a tissue, enabling exchange at the cellular level. It describes delivering oxygen and nutrients to the tissue and carrying away carbon dioxide and wastes. The best description is the delivery of blood to a capillary bed, because it is through that capillary network that nutrients reach cells and wastes are removed. The other options describe related processes but not perfusion itself: removing waste from capillaries is part of exchange rather than the act of delivering blood to tissue; returning blood to the heart via veins is venous return; mixing of blood in the chambers relates to cardiac mixing, not tissue perfusion.