The answer is dermatologist. Dermatologists specialize in skin care and what not.
The answer is “short-lived”
Collagen
is a protein fiber that is found in the matrix that lies outside the bone
cells. Population of these collagen fibers that scattered through the matrix are
embedded in a gel-like ground substance called hyaline cartilage, which
is flexible but avascular and contains no nerves or blood vessels.
#12 should be~ A.) The ability to maintain control of your body while stationary or moving.
#13 I think is also~ A.) Atrophy.
#14 I'm positive should be~ C.) How long you exercise.
<em>I hope this helps you.</em>