lezapancakes13
28.08.2019 •
Biology
How does blood return from the cardiac tissues to the right atrium
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Ответ:
the blood goes through the tricuspid valve and into the right ventricle then the right ventricle makes the blood go to the lungs and thats where the oxygen is at then the blood goes through organs and tissues then gets to the heart through the veins and a vein named the vena cave has the blood return to the right atrium.
Ответ:
The regulation of gene expression conserves energy and space. It would require a significant amount of energy for an organism to express every gene at all times, so it is more energy efficient to turn on the genes only when they are required.
Explanation: