Overview Of The Cardiovascular System

Question 1

Function of the cardiovascular system

Answer 1

Transport of O2 and CO2, nutrients, metabolites, hormones, heat

Question 2

Which organs etc are in series

Answer 2

Blood goes through:
Hypothalamus then anterior pituitary gland
Gut then liver

Question 3

What does most vascular beds being in parallel mean

Answer 3

All tissues get oxygenated blood

Allows regional redirection of blood

Question 4

Which organs get most blood

Answer 4

Abdominal organs - 24%
Kidneys - 20%
Skeletal muscle - 20%

Question 5

Which organs use most oxygen

Answer 5

Abdominal organs - 30%
Skeletal muscle - 20%
Brain - 18%

Question 6

Venous blood flow through the different size of vessels

Answer 6

Capillaries then venules then veins

Question 7

System of flow for arterial blood (sizes of vessels)

Answer 7

Aorta then arteries then arterioles then capillaries

Question 8

Properties of the aorta

Answer 8

Elastic with a wide lumen

Question 9

Properties of arteries

Answer 9

Muscular with a wide lumen and non elastic wall

Question 10

Properties of arterioles

Answer 10

Narrow lumen with thick contractile wall. Control resistance and flow, allowing regional redirection of blood

Question 11

Properties of capillaries

Answer 11

Narrow lumens and thin walls

Question 12

Properties of capacitance vessels (venules and veins)

Answer 12

Wide lumens, distensible walls, reservoir of blood. Low resistance and allows fractional distribution of blood

Question 13

What holds the tricuspid (right) and the mitral (left) valves from inverting

Answer 13

Chordae tendonae attached to the papillary muscles