Cells are the basic units of life and form the first level of organization. Cells in the human body have specific functions. Examples include nerve cells, blood cells, liver cells, and so on. Cells themselves are made of various macromolecules that form organelles.
You can attain physical fitness by eating healthier and working out
You can reduce stress with therapy and the relaxation of the brain and the part of the brain that stimulates the feeling of stress.