Cardio

Question 1

What is the purpose of the cardiovascular system?

Answer 1

-provides oxygen and nutrient delivery
-removes metabolic waste

Question 2

How is blood flow generated by the cardiovascular system?

Answer 2

Through pressure

Question 3

Which ventricle does the blood move into aorta from?

Answer 3

-it moves in from the left ventricle
-aorta then branches into main arteries supplying organ systems

Question 4

Are most artery systems in the body in a parallel or series circuit?

Answer 4

They are in a parallel circuit
->the only ones in a series are the hepatic portal system(gut to liver), hypothalamus-anterior pituitary and renal glomeruli to tubules

Question 5

What is the purpose of the parallel circuit?

Answer 5

-each organ receives a portion of blood pumped from the left ventricle
-as well, each organ receives freshly oxygenated blood
-in a parallel system, blood flow can be tailored to specific needs

Question 6

What is the definition of hemodynamics?

Answer 6

-relationship between blood flow, pressure and resistance

Question 7

What is hydrostatic pressure?

Answer 7

-blood flow within a vessel results in hydrostatic pressure

Question 8

What is the formula for blood flow

Answer 8

-it is pressure gradient over resistance

Question 9

What are the factors that determine resistance

Answer 9

1. Viscosity
2. Vessel length(doesn’t really matter)
3. Vessel radius
   ->smaller radius=increased resistance
   ->note small changes in vessel radius profoundly impacts vascular resistance