important role is to regulate the movement of materials into and out of cells. The phospholipid bilayer structure (fluid mosaic model) with specific membrane. proteins accounts for the selective permeability of the membrane and passive. and active transport mechanisms.
Structure of Blood Vessels a) Three distinct layers or tunics form the walls of blood vessels: ---The tunica interna (tunica intima) is the innermost layer.It contains the endothelium which is a continuation of the endocardial lining of the heart.tructure of Blood Vessels a) Three distinct layers or tunics form the walls of blood vessels: ---The tunica interna (tunica intima) is the innermost layer.
Endothelium is the internal lining of your blood vessels 10. Viscera a. A delicate layer called a serous membrane lines the walls of these internal cavities and covers the surfaces of the enclosed viscera. 11. Thoracic Cavity a. Each pleural cavity, which contains a lung, is lined by a shiny, slippery serous membrane that reduces the friction as the lung expands and recoils during respiration. b. The serous membrane lining a pleural cavity is called pleura. The visceral pleura covers the outer surfaces of the lung, the parietal pleura covers the inner surfaces of the lung. c.