Topic 3 Circulatory System: Heart Contraction

Question 1

• Large muscle
• Not anchored to any bones like skeletal muscles
• Its fibers form a net and the net contracts upon itself, which squeezes blood into arteries

Answer 1

Heart

Question 2

• Have thicker walls than atria and generate higher blood pressure because they must pump blood throughout body and lungs

Answer 2

Ventricles

Question 3

• Only needs to generate enough pressure to fill ventricles

Answer 3

Atria

Question 4

• Thicker than right because pumps blood to most of body

Answer 4

Left Ventricle

Question 5

• Only pumps to lungs

Answer 5

Right Ventricle

Question 6

• Occurs when atria or ventricles contract

Answer 6

Systole

Question 7

• Occurs during relaxation of atria or ventricles

Answer 7

Diastole

Question 8

• Aortic and pulmonary valves

Answer 8

Semilunar Valves

Question 9

• Tricuspid/right AV valves and bicuspid/left AV/mitral

Answer 9

Atrioventricular Valves