Question

Describe the wall of lymphatic capillaries.

a. Thin-walled, with tightly joined squamous cells

b. Thin-walled, with tightly joined cuboidal cells

c. Thick-walled, with overlapping squamous cells

d. Thick-walled, with tightly joined squamous cells

e. Thin-walled, with overlapping squamous cells

Answer 1

Lymphatic capillaries have thin walls, only as thin as a single cell. The cells overlap each other so that interstitial fluid easily enters the capillaries. Lymphatic capillaries are closed at one end. They contain a mini-valve that lets interstitial fluid flow into but not out of them.