The diagram shows how blood pressure changes on the left side of the heart during the cardiac cycle. The valves either open or shut at the numbered points. Which row names the valves that are opening or closing at the numbered points?
- Aatrioventricular valve opens 1; semilunar valve opens 3; atrioventricular valve closes 4; semilunar valve closes 2
- Batrioventricular valve opens 2; semilunar valve opens 4; atrioventricular valve closes 3; semilunar valve closes 1
- Catrioventricular valve opens 3; semilunar valve opens 1; atrioventricular valve closes 2; semilunar valve closes 4
- Datrioventricular valve opens 4; semilunar valve opens 2; atrioventricular valve closes 1; semilunar valve closes 3