Science, asked by nazialakecity, 5 months ago

every contraction of atria and ventricle produces​

Answers

Answered by iTzRiYaNsH
1

Answer:

The ventricles begin to contract (ventricular systole), raising pressure within the ventricles. When ventricular pressure rises above the pressure in the atria, blood flows toward the atria, producing the first heart sound, S1 or lub.

Answered by ItzAbhi47
4

Answer:

Hyyy

Explanation:

The ventricles begin to contract (ventricular systole), raising pressure within the ventricles. When ventricular pressure rises above the pressure in the atria, blood flows toward the atria, producing the first heart sound, S1 or lub.

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