Heart 2

Question 1

What do the atrioventricular valves do?

Answer 1

Prevent backflow of blood into atria when ventricles contract

Question 2

Why do ventricles have thicker muscular walls than atria?

Answer 2

So they can create enough force when they contract to push blood out of heart through arteries

Question 3

Where are the semilunar valves found?

Answer 3

Aorta & pulmonary artery

Question 4

What do semilunar valves do?

Answer 4

Prevent backflow of blood into ventricles

Question 5

Why does the left ventricle have a thicker more muscular wall than right ventricle?

Answer 5

Allows it to contract with more force & push blood at a higher pressure out through aorta to whole body, whereas right ventricle only need blood to travel short distance to lungs

Question 6

Why does blood lose pressure as it moves along vessel from aorta?

Answer 6

Due to it branching into many vessels, the increasing of lumen size & friction