The inhalation and exhalation of air and involves the exchange of air
During the Krebs cycle, the two carbon atoms of acetyl-CoA are released, and each forms a carbon dioxide molecule. ... At the end of the Krebs cycle, the final product is oxaloacetic acid.
The femur is not part of the circulatory system because it is a bone.
You can try to put your self into a calm mode and just relax and breath Hope this helps :)
