Heart

Question 1

Pulmonary vs Systemic circuit

Answer 1

Pulmonary is heart to lungs, Systemic is everywhere else

Question 2

Describe position of heart

Answer 2

Tilted anteriorly, slightly rotated

Question 3

Great vessels that carry oxy rich blood

Answer 3

Pulmonary vein, aorta

Question 4

Systole

Answer 4

Ventricular contraction

Question 5

Diastole

Answer 5

Ventricular relaxation

Question 6

What causes closing of AV valves?

Answer 6

Ventricle contracting

Question 7

What causes opening of semilunar valves?

Answer 7

Ventricle pressure > artery pressure

Question 8

What causes closing of semilunar valves?

Answer 8

Artery pressure > ventricle pressure

Question 9

Path of blood through the heart

Answer 9

From vena cavae to atriums. 80% flows naturally to ventricles, 20% is ejected when atriums contract. Atriums relax. Ventricles contract, and AV valves (R.tricuspid and L.bicuspid) close. Papillary muscles put tension on chordae tendinae to prevent AV prolapse. Semilunar (R.pulmonary and L.aortic) valves open, blood enters arteries, ventricles relax causing the semilunar valves to close. AV valves open.