Lymph Enters a Lymph Capillary By

Question

Lymph enters a lymph capillary by
A) diffusion through the wall of the capillary
B) osmosis through the wall of the capillary
C) pressure from the accumulation of fluid that forces the fluid between the cells that make up the wall
D) pressure from the contraction of the heart

Accepted Answer

Lymph enters a lymph capillary by pressure from the accumulation of fluid that forces the fluid between the cells that make up the wall. Lymphatic capillaries have overlapping endothelial cells that act as one-way flaps, allowing interstitial fluid and solutes to enter but preventing their return to the interstitial space. The pressure from the accumulation of fluid forces the flaps of endothelial cells to open, which allows the interstitial fluid and solutes to enter the lymphatic capillary.