Centeral nervous system includes the brain and spinal cord while the peripheral includes nerves that branch out
Phospholipid bilayers are critical components of cell membranes. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell. However, an important function of the cell membrane is to allow selective passage of certain substances into and out of cells.
Answer:
growing pains maybe? if its really bad though you should go to the doctor
Explanation: