short term effect on the skeletal system

When your exercising your bones are under significant amount of pressure.

Your bones need calcium to survive that pressure. Calcium makes your bone stronger and bigger, so there will be less stress on your bone when your doing weight-bearing exercises. 

Our bodies produce cells called Osteoblasts, which build new bones and make bones stronger and denser and that lowers the risk of Osteoporosis.

If your bone is weak, then your bones will break with the slightest stress on them, so your bones need calcium.

There will be an increase of bone density (bone strength) due to increase in calcium production, Also stronger connectives tissues (Ligaments and Tendons), so more resistant to injury.

 Skeletal muscles adapt to using more oxygen, the muscles and their capillaries become more efficient and can therefore work for a longer period of time.

If you do a lot of high impact activities, it will encourage new bone formation. weight-bearing exercise such as like strength training and running puts stress through your bones. Your bones response to this stress by creating new bones that are stronger so next time when you do the same exercise your bones will cope with the exercise.

Function of Respiratory System.

The respiratory system makes us breathe. Brings oxygen into our body and takes carbon dioxide out. Our lungs put the oxygen into our blood cell and takes out carbon dioxide from the used blood cell. when your breathing your inter-coastal muscles contract and allows air to come in. Diaphragm and inter-coastal let us breathe, our lungs don't do much work. Our nose and mouth is only way air can get in. Our nose hair, because to clean the air we take in. It stops all the bacteria and molecules that are in the air. Epiglottis is what stops food getting into our Respiratory System. The Epiglottis closes when were eating, so food doesn't go into the Respirator System. We have Bronchi ( one entering each lung). The Bronchi splits up into loads of tubes and those tubes make everything happen, also make the change as well. The Alveoli makes gaseous exchange. The Alveoli have small thin wall. Only two muscles make the breathing happen. Diaphragm is the muscles below the lungs that create a vacuum and the other one is the inter-coastal muscle. The inter-coastal muscle is in the gap between two ribs.