Which of the Following Organs Would Be Most Likely to Contain

Question

Which of the following organs would be most likely to contain fenestrated capillaries?
A) spleen
B) kidney
C) bone marrow
D) muscle
E) pancreas

Accepted Answer

Fenestrated capillaries are characterized by their perforated endothelial cells, which allow for increased permeability. The kidney is an example of an organ that contains fenestrated capillaries because it needs to filter waste products from the blood. The spleen, bone marrow, and pancreas have sinusoidal capillaries, which are wider and more porous than typical capillaries but are not fenestrated. Muscle tissue contains continuous capillaries, which have tight junctions between endothelial cells and are the least permeable of the three types of capillaries.