Why are amino acids called "amino acids?"

Amino acids are called amino acids because of the amino group and the carbonxyl group acts as an acid giving up an H.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.