structure and function of lymph capillaries
Lymph is ultimately returned to the venous circulation. Lymphatic capillaries are slightly larger in diameter than blood capillaries, and have closed ends (unlike the loop structure of blood capillaries). Their unique structure permits interstitial fluid to flow into them but not out.The ends of the endothelial cells that make up the wall of a lymphatic capillary overlap.ymph is ultimately returned to the venous circulation. Lymphatic capillaries are slightly larger in diameter than blood capillaries, and have closed ends (unlike the loop structure of blood capillaries). Their unique structure permits interstitial fluid to flow into them but not out.