Answer: C Btw quick tip this should go in health catagory
Explanation: the extra mucus that builds up in the trachea slows down breathing rates making it hard to breathe. It also slows down heart rates without the normal air you need he will feel weak and be mainly affected by his lungs and heart. If it gets to bad the heart will have to little air and have a mass carbon build up causing death. Pls give me brainliest :D
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force.
Answer:
1st one
Explanation:
DNA replace the old cells
Animals i think
i have the same question that i don’t understand sorry i’m commenting so i can see if anyone else gets that answer
