Vessels: Arteries & Arterioles (9)

what kind of epithelial cells line all BVs

endothelial cells line inner layer of all BVs

components of vessel walls

smooth muscle, fibrous connective tissue (collagen), elastic connective tissue (elastin)

which vessels contain elastic tissue

artery & vein

which vessels contain smooth muscle

arteries (thickest layer of smooth muscle), arterioles, veinsw

which vessels contain fibrous muscle

artery, venue, vein

what does elastic tissue allow vessels to do

when stretched, it stores energy in form of elastic energy; as systole ends & diastole starts = squeeze back and spring back like a rubber band

which vessels only contain endothelium and not any additional tissues

capillaries, bc we only want exchange + diffusion so we want least of diffusion barrier possible

which vessel is most compliant

veins

elastic recoil in aorta

systole: blood pump out

diastole: squeeze back to maintain BP & delta P that continues driving flow around systemic circuit

arteries → rapid transport pathway

• large diameter

• little resistance

• walls contain elastic + fibrous tissue

• under high pressure

arteries → as pressure resevoir

• high pressure but we don’t regulate it here (arterioles)

• thick elastic arterial walls

• low compliance means a small increase in volume = large increase in BP

• expand as blood enters arteries during systole

• recoil during diastole

which vessels can control TPR through vasoconstriction and vasodilation

arterioles