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.
What is the innermost layer of the heart wall called? Ans: The innermost layer of the heart wall is called the endocardium. 4. Name the depression between the two ventricles seen on the anterior surface of the heart. Ans: The depression between the two ventricles is the interventricular groove or interventricular sulcus.