Flashcards in CVT 101 Vascular Anatomy Deck (17)
what is the three circulatory circuits?
What is the function of the portal system?
The portal system screens what you ingest before it goes into the systemic circulation.
what is the function of the pulmonary system?
What is the function of the systemic circulation?
whole body circulation
What is renal function?
what starts and ends as capillaries instead of arteries and veins?
portal system - begins and ends as capillaries.
Whaich might be considered a fourth circulatory circuit?
begins and ends as capillaries connects digestive loop with liver, hepatic vein, and IVC. RBC hemoglobin cycle
five types of vessels
Which contains most of the blood volume?
64% venules, veins, and vena vavae
2/3 to 3/4 of blood volume
which type of vessel consists of only one layer of endothelial cells?
Veins have approximately how much more CSA than arteries at the same level?
Total CSA about it times that of corresponding arteries.
Across which vessels does the greatest pressure drop occur?
What is a vaso vasorum?
blood supply to the vascular tissue
what are the three layers of vessel walls?
1. Tunica intima: smooth inner lining of vessels; single layer of endothelial cells Normally has anti-clotting, anti-platelet properties; interruption of these may start most vascular disease— both atherosclerosis and thrombosis
2. Tunica media: middle layer with smooth muscle cells, elastin, and collagen Composition of this layer determines the vessels' mechanical properties
3. Tunica adventitia: outer layer made up of connective tissue
What is the relative proportion of elastic to smooth muscle tissue in the media in proximal arteries vs. distal arteries?
So proximal to arteries the more elasticity you have and less smooth muscle and the more distal you go less elasticity there is and more smooth muscle.