It is the nucleus because it stores your DNA
The answers is all of the above
Muscles are <u>repaired </u>and built back up throughout life with new muscle tissue.
Answer:
When CO2 is breathed into the lungs, it dissolves in the water there, diffuses across the alveolar-capillary membrane, and enters the bloodstream. As it combines with water, it forms carbonic acid, making the blood acidic. So CO2 in the bloodstream lowers the blood pH.
