Answer: Dude psst its vitamin B-12.
Explanation:
The layer that encloses and protects the heart is
Pericardium
The difference between drugs and medicines is pretty basic, but a lot of people often interchange them. The main thing that differentiates them are their legality and society's perception of them. Both are used for the treatment or cure of diseases, but drugs have a more stimulating and addictive effect to the body than medicine. On the other hand, medicines generally don't have such effects.
PTSD, or Post traumatic Stress Disorder.
Muscular endurance is your answer hope this helps!
