endothelial cell

elastic artery

muscular artery

tunica media

Smooth muscle cells in the walls of elastic arteries regulate the blood supply to their target tissues.

Blood plasma can freely pass the walls of discontinuous capillaries.

The tunica media of veins is typically wider than the tunica media of arteries.

Lymph ducts give empty into a network of irregularly shaped lymph capillaries.

The increase of the total diameter of the vascular tree from aorta to capillaries results in a decrease of blood pressure.

Blood plasma can freely pass the walls of discontinuous capillaries.

The compression of lymph collecting vessels by the surrounding tissue is important for lymphatic drainage.

The external elastic lamina delimits the tunica intima from the tunica media.

vein valve

external elastic lamina

venule

capillary

internal elastic lamina

tunica adventitia

large vein

tunica media

external elastic lamina

elastic artery

tunica media

large vein

smooth muscle

tunica adventitia

capillary

arteriole

tunica adventitia

arteriole

external elastic lamina

endothelial cell

elastic artery

muscular artery

large vein

small artery