Question

Capillaries are primarily:

A.
Basal lamina
B.
Adventitia
C.
Elastin
D.
Endothelium

Answer 1

D. Endothelium

Step-by-step explanation:

Capillaries contain only endothelial cells with occasional support cell. Endothelium one continuous layer of cells in all vessels. Endothelia cells are polarized with one surface, lumenal, facing the lumen of blood vessels and the opposite surface, adluminal, facing the basement membrane.

Answer 2

endothelium is the correct answer