Answer:

Our body is made up of bones and muscles. The basic structure of our body is known as cell. When many cells combine together then it is known as tissue. When may tissue are combine together it is known as organ. Organs combine to form Organ system. And organ systems form a body
Answer:
Sarcopenia.
Explanation:
loss of muscle tissue as a natural part of the aging process.
It more common in aging people.
As far as I know sleeping well is one action that can assist in both physical and mental reparations. Without sleep you can’t form or maintain the pathways in your brain that let you learn and create new memories, and it’s harder to concentrate and respond quickly.