Which of the following regions of the vascular bed is the actual site of gas exchange with surrounding tissue?
A) Arteries
B) Capillaries
C) Lymphatic vessels
D) Veins
E) Venules

Question

Quizplus · Accepted Answer

Capillaries are the smallest blood vessels in the body where gas exchange occurs with surrounding tissue through the process of diffusion. Oxygen from the capillaries diffuses into the tissue cells while carbon dioxide produced by the cells diffuses into the capillary for removal. Arteries carry oxygenated blood away from the heart to the tissues while veins carry deoxygenated blood from the tissues back to the heart. Lymphatic vessels are responsible for carrying lymph fluid and immune cells throughout the body. Venules are small veins that receive blood from capillaries and transport it to larger veins.

Which of the Following Regions of the Vascular Bed Is