Cardiovascular System Flashcards
1
Q
What are the three layers of a blood vessel wall,what tissue compose each layer
A
Tunica Interna- endothelium and connective tissue
Tunica Media- smooth muscle
Tunica Externa- Fiberous connective tissue
2
Q
4 differences between arteries and veins compare structure to a capillary
A
Artery -away from heart -no valve -high pressure -heart is pump Vein -towards heart -lo pressure -skeletal muscle is pump -has valve Capillary has small vessels and thinnests walls
3
Q
What is the purpose of precapillary sphincters
A
Regulate blood distribution in the capillary pathways
4
Q
Hypertension
A
High systolic (above 140mmHg) can be dangerous îf chronic
5
Q
Hypotension
A
Low systolic ( below 110mmHg) often associated with illness
6
Q
Formula used to calculate BP
A
Cardiac out put x peripheral resistance=Blood Pressure
