In Cross Section, a Lymph Vessel Can Be Distinguished from Arteries

Multiple Choice

In cross section, a lymph vessel can be distinguished from arteries or veins because

A) only the endothelial cells of the lymph vessel show nuclei.
B) of the large number of smooth muscle fibers in the walls.
C) the lymph vessel is usually not associated with arteries or veins, while the latter usually run together.
D) the walls of the lymphatic vessels usually contract more during the sectioning and staining process, and usually appear to be smaller than other vessels of a similar size.
E) the lymphatic vessels have the thinnest walls of all the vessel types.