Answer:
VO2
Explanation:
This should be the right answer.
Mary Martin, America's favorite leading lady of musical comedy, as Ens. Nellie Forbush in "South Pacific," Maria von Trapp in "The Sound of Music" or the title role in "Peter Pan," died Saturday afternoon at her home in Rancho Mirage, Calif. She was 76 years old.
Answer:
The “lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
