-
artery
vessel that carries blood away from heart
-
vein
vessel that carries blood to heart
-
arteriole
small artery; its diameter greatly influences blood flow and pressure
-
-
capillary
- smallest of blood vessels; connects arteriole to venule.
- its very thin wall consists only of tunica interna and allows the exchange of gases, nutrients, and waste products btwn blood and tissues
-
tunica interna
- aka tunica intima
- innermost layer of blood vessel wall
-
tunica media
- middle layer of blood vessel wall
- consists mostly of circularly arranged smooth muscle and sheets of elastic tissue
-
tunica externa
- aka tunica adventitia
- outermost layer of blood vessel wall
-
endothelium
simple squamous epithelium of tunica interna
-
vasa vasorum
small blood vessels in tunica externa of lrg blood vessels
-
aorta
largest artery of body and main artery of systemic cicuit
-
vena cava
largest vein of body and main vein of systemic circuit
-
systemic circuit
blood vessels that supply oxygen-rich blood to the tissues and removes oxygen-poor blood to heart
-
pulmonary circuit
blood vessels that take oxygen-poor blood to the lungs and deliver oxygen-rich blood to the heart
-
elastic artery
- aka conducting artery
- a lrg, thick-walled vessel near heart
- having a relatively lrg amount of elastic tissue in its wall, and elastic artery can stretch during ventricular systole and rebound during ventricular diastole
- the aorta is a good ex.
-
muscular artery
- aka distributing artery
- medium-sized artery that delivers blood from and elastic artery to a specific organ
- relatively has lrg amount of smooth muscle in its wall
-
precapillary sphincter
a cuff of smooth muscle that acts as a valve to regulate blood flow into a capillary
-
venous valve
- valve in a vein of extremitiesprevents backflow of blood
- the cusps of the valve are folds of the tunica interna and resembles those of the semilunar valves of the heart
-
muscular pump
the prolusion of venous blood by the action of skeletal muscles
-
respiratory pump
the drawing of venous blood into the thorax during inspiration
-
venous sinus
- a specialized, thin-walled vein
- ex dural sinuses of the brain
- coronary sinus of the heart
-
anastamosis
- a lateral connection btwn parallel vessels
- anastomoses can be artery-to-artery, vein-to-vein, and artery-to-veing (anteriovenous)
-
collaterals
parallel vessels that are connected by anastamosis
-
continuous capillary
- capillary whose endothelium has numerous tight junctions and allows only minimal passage of plasma and all solutes
- most common type of capillary in body
-
fenestrated capillary
- capillary whose enothelial cells have pores that allow passage of plasma and small solutes
- fenestrated capillaries are found in enndocrine glands, the small intestine, and kidneys
|
|