Blood Vessels- ARTERY
ARTERY- takes blood AWAY from Heart (pulmonary artey -> lungs, aorta to body) Arteries always carry oxygenated blood.
thick wall (withstands high pressure), smooth muscle + elastic fibres (alters lumen dimension, smooth flow- allows recoil), smooth lining endothelial cells (reduction in friction), narrow lumen (smooth muscle regulates size to smooth flow)
Carotid Arteries-> head/neck
Aorta-> To Body.
Arteries become arterioles that feed blood to the capillaries, that then feeds the venules then veins. In this process waste is transfered to the blood and exchanged materials delivered.