BIOL 2443 Lecture Notes - Lecture 11: Vasa Vasorum, Tunica Media, Pulmonary Artery
Document Summary
There are 5 main types of blood vessels: arteries, arterioles, capillaries, venules, veins. Innermost layer of a blood vessel that comes in contact with blood as it flows through the lumen. Basal lamina/basement membrane: collagen fivers to give tensile strength, resitnace to stretching and recoiling. Vasa vasorum, or vessels to the vessels. Assist with anchoring vessels to surrounding tissue. Compliance walls can easily stretch and expand without tearing with small. Elastic lamellae thick tunica media and elastic fibers. Pressure reservoir stored mechanical energy arising from stretching of the. Largest arteries in the body (aorta and pulmonary trunk) Largest diameter among arteries but relatively thin walls. Elastic fibers recoil to convert stored energy into kinetic energy of the blood elastic vessel. Capable of greater vasoconstriction and casoldilation to adjust the rate of blood flow. Not as much elastic tissue in the walls so these vessels don"t have the ability to recoil and help propel the blood like elastic arteries.
