Question

Which of the following is not true of lymphatic capillaries?
Multiple Choice
a. They are lined with endothelial cells joined with tight junctions.
b. There is no continuous basement membrane in the wall.
c. Gaps between endothelial cells permit lymphocytes to pass.
d. They are closed at one end.
e. They are more permeable than blood capillaries.

Answer 1

Answer: D: They are closed at one end

Explanation:

"Lymphatic Capillaries" are tiny, thin walled microvessels located in spaces between cells and their main function is to drain and process extracellular fluid.

They are larger than blood capillaries and have "closed ends". Their unique structure permits interstitial fluid to flow into them but not out. Thus their ends are closed unlike the loop structure of blood capillaries.