Polymerization would be the answer you're looking for.
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
The 4 main points I’m not sure what u mean but if u refrase it
Hello.
The answer is <span>Passive transport.
</span>The movement of substances<span> in and out of a </span>cell<span> membrane </span>without the use of energy<span> by the </span><span>cell.
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Have a nice day
