IMMUNOLOGY

Detailed explanation-1: -Lymphatic capillaries are similar to blood capillaries, but they are larger in diameter and have closed ends. Unlike blood capillaries, fluid can flow into lymph capillaries but can’t flow out through the cell walls. It can only move forward.

Detailed explanation-2: -Answer and Explanation: The high degree of permeability of lymphatic capillaries allows the interstitial fluid to easily enter the capillary. This process reduces the amount of extra interstitial fluid in tissues. Once inside the lymph capillaries, this fluid becomes lymph and is carried towards the circulatory system.

Detailed explanation-3: -The normal permeability of the lymphatics was studied with dyes of graded diffusibility. Their walls proved readily permeable for those highly diffusible pigments that the blood capillaries let through easily, but retained those that the latter retained.

Detailed explanation-4: -Which of the following is true about both lymphatic and blood capillaries? Both types of vessels are microscopic and are formed from sheets of endothelium.