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.
Answer:
The vaccine that protect humans from the h1n1 virus is called Panvax vaccine or swine flu vaccines.
Explanation:They are inactivated H1N1 virus vaccines used for immunization of individuals 6 months of age and older against influenza disease caused by H1N1 2009 virus.
Answer: 15
Explanation: since it affects only 1 out of 20, you can divide 300 by 20 which equals 15
Answer:
1st blank: "acini", 2nd blank: "pancreatic islets or islets of Langerhorns."
Explanation:
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