Heart Chambers and Valves

Question 1

Atrias

Answer 1

• receiving chambers
• blood flows into them passively
• provide blood to ventricles

Question 2

Ventricles

Answer 2

• discharging chambers
• thick walls
• pumps the blood out of the heart
• right is more anterior

Question 3

Composition

Answer 3

• two atria and ventricles
• right and left divided by interatrial and interventricular septum (septa plur)
• chambers and pumps divided by valves

Question 4

Function of Valves

Answer 4

• endure blood flows only through one direction

- semilunar and atrioventricular

Question 5

AV valves

Answer 5

• open passively until forced closed when BP in the ventricles > BP atria
• chordate tendinae and papillary muscles prevent them from blown into atrium

Question 6

Semilunar valves

Answer 6

• three leaflets
• forced open when BP im ventricles in high
• closes when ventricles relax, as blood flows back into the heart

Question 7

Valvular Stenosis

Answer 7

-Valves become too stiff from repeated bacterial infection