Answer:
Bones
Explanation:
The integumentary system is the skin. You have erector pilli muscles, blood vessels and nerves all within the skin. But not bone
The fact that the cerebrum is still developing during adolescence explains why teenagers act the way that they do is because their brain cannot yet fully comprehend some of the things that they do.
I guess its medical, if not, philosophical
Answer:
f
Explanation:
drug addiction is based on how the person hadles or feels about the drug or likes the way it makes them feel.