Well if you regularly workout a lot from day to day, you are probably fit for your age, depending on what type of lifestyle you live. Some of the following could be, increased muscle capacity, healthier lungs, increased stamina, things in that area.
No, I do not think it is the best way for them to be efficient.
This substance is produced in the liver, flows into small intestine, where it breaks down fat. nutrients are then absorbed through the wall of the small intestine.
the fat-soluble vitamins enter the vessels before making their way into the bloodstream.
Musculoskeletal system: Muscular System and Skeletal System
when you flex a muscle it pulls on the bones.
our skeletal system is what keeps us upright and protects vital organs.
the muscles move the bones which allows us to move.