The respiratory system's main function is to facilitate gas exchange, allowing oxygen to enter the body and carbon dioxide to be expelled. This process occurs in the lungs, where air is brought in, and crucial gases are exchanged. Understanding this function is essential for recognizing how our body interacts with the environment. ;
The cell membrane serves several key functions including selective permeability, protection, communication, structural support, and transportation. It acts as a barrier that regulates what enters and leaves the cell, ensuring the cell remains stable and functional. Thus, the cell membrane is fundamental to cellular life and overall organismal health.
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