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tatiyna
3 years ago
9

Which valves produce the second heart sound when they snap shut?

Biology
1 answer:
Taya2010 [7]3 years ago
5 0
Answer: D) Pulmonary and aortic valves.

Explanation
There are two main heartbeats from a healthy heart.

The first beat is called the S1 or the lub, and it occurs when the atrioventricular valves (comprising the mitral and tricuspid valves) close.

The second beat is called the S2 or the dub, and it occurs when the semilunar valves (comprising the aortic and pulmonary valves) close.

Listening for heart beats is an essential part of cardiac auscultation.
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A concentration.

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4 years ago
Four friends were arguing about the flow of energy between organisms in a food chain. They
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I would agree more with Amos' opinion, thinking that most of the plant's energy ends up in the grasshopper.

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Energy and nutrients in an ecosystem brainly.com/question/8101088

7 0
3 years ago
​a region of dna that contains instructions for the amino acid sequence of a particular protein is called a(n) ____.
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8 0
4 years ago
Please explain in detail! thanks!!
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6 0
3 years ago
How is a tissue different from an organ? How are they similar?
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They are similar by both of them working together to accomplish specific functions.

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hope this helps
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3 years ago
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