Blood Vessels Flashcards
(29 cards)
What are venues?
The tinniest veins
What are the three physical characteristics of arteries?
- Thick-walled 2. Elastic 3. Smooth muscle
Do you feel your pulse in your arteries or veins?
Arteries
Do arteries or veins have valves?
Veins
What has blood reservoirs?
Veins
What percent of blood volume are in blood reservoirs?
60-70%
What is the major site of peripheral resistance which affects blood pressure/
Arterioles
Do arterioles respond to SNS or PNS?
Primarily sympathetic innervation
Do arterioles respond to ANS?
Yes
What veins have little to no smooth muscle?
Venules
What is a another name for arterioles?
Resistance vessels
What are capillaries?
The body’s exchange vessels which allow for diffusion/filtration of nutrients/waste between blood and tissue cells.
What makes up the wall of capillaries?
simple squamous epithelium
Are capillaries microscopic?
Yes
What is the flow of capillaries regulated by?
Precapillary sphincters
Is the aorta ascending or descending?
Ascending
How many coronary arteries are there?
2
What are the three main functions of the coronary arteries?
- Supply oxygenated blood to myocardium 2. First 2 branches off aorta (ascending aorta) 3. Fill with blood during ventricular relaxation
What is the order of coronary circulation? (5 steps)
L&R coronary arteries > capillary beds > cardiac veins > coronary sinus (vein) > Right atrium
What is the circle of Willis?
Arterial anastomosis at base of brain
What are three superficial veins of the arms?
- Basilic 2 Cephalic 3. Median cubital
Portal veins carry blood into the liver from where?
- Splenic v. 2. gastric v. 3. Superior mesenteric v. 4. Inferior mesenteric v.
What is the function of the hepatic portal system?
Carries blood from abdominal viscera to liver to be detoxified and modified before returning it to general circulation.
What are are Kupffer cells?
A phagocytic cell that forms the lining of the sinusoids of the liver and is involved in the breakdown of red blood cells.
