Question

what is ER??????????????

Answer 1

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What is ER?

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The endoplasmic reticulum (ER) is a large network of membrane bound tubes and sheets. The ER is similar structure to the plasma membrane.

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There are two types of ER :-

✯Rough endoplasmic reticulum(RER).

✯ Smooth endoplasmic reticulum(SER).

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Answer 2

Answer:

In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction. ... In contrast, exhalation (breathing out) is usually a passive process.