Compared to Blood Capillaries, Lymphatic Capillaries ________

Question

Compared to blood capillaries, lymphatic capillaries ________.
A) are much less permeable
B) are smaller in diameter
C) have smaller gaps between endothelial cells
D) are more permeable
E) have a round, regular outline

Accepted Answer

Lymphatic capillaries are more permeable than blood capillaries, allowing them to collect excess fluid and proteins from the tissues and return them to the bloodstream. Lymphatic capillaries also have overlapping endothelial cells that create flap-like valves, which help prevent lymph from leaking out of the vessels.