The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
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D- Iron
~+lil more info!+~
Iron is the ultimate nuclear “ash,” from which no nuclear energy can be extracted.
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what I don't understand what is the Ctcagt
A chicken can only lay one egg a day. my friend mother has chickens thats how I no.
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Although you might have heard people talk about a gene for red hair, green eyes or other characteristics, it's important to remember that genes code for proteins, not traits. While your genetic makeup does indeed determine physical traits like eye color, hair color and so forth, your genes affect these traits indirectly by way of the proteins created via DNA.
Hopefully, this answer helped! :D
