Understand the functioning of the body systems associated with energy and metabolism

The physiology of the Respiratory System
Oxygen is needed by the cells as it contributes to the stimulation of ATP which is required and essential for energy metabolism. When oxygen is impassive from the air which we breathed in and exchanged gases begin to take place among the blood and the air which is situated in the alveoli.
When gas and air begin to exchange together this arises in the alveoli. Within the surface of the alveoli the part of the alveoli is usually about 70 - 100m2. This makes it easier for the exchange to come into place within the alveoli as it has plenty of room to do so.
The air in our body enters into our lungs and then it transports and passes through to the alveoli. When oxygen is in our alveoli walls and reaches into our blood the oxygen begins to change. This is where it combines with hemoglobin which is in our red blood cells.
When carbon dioxide reaches our blood it changes then into our alveoli walls from there it is then breathed out.
Our Respiratory system is basically the same to energy metabolism. Our Respiratory system helps the production of energy by helping it to supply the cells with enough oxygen, it helps to flow continuous oxygen throughout our Respiratory system. It also helps to get rid of carbon dioxide. The cell tissue within our body system helps to release the energy in molecules such as glucose. The structure of the Respiratory is made to transport to oxygen.
The physiology of the Digestive System
The digestive system is the same as the energy metabolism. Glucose is the preferred fuel which is used for the production of ATP. Glucose is transported from the digestion of carbohydrate and then it is absorbed into the capillaries in the small intestine then it is then transported in a circulation movement to the liver. In our liver the glucose is needed to provide chemical energy in the ATP.
The carbohydrate and fat in our digestive system is needed to provide most of our energy which is required in our bodies. When our bodies are low our bodies can then start to form glucose from non-carbohydrates. This is things such as amino, acids and glycerol.
The glucose is transported to the cells in the small intestines which are across the walls of the capillaries. The transport of the glucose is necessary as the diffusion in our body systems would be slow and it would not meet the body's needs. The glucose is broken down, because of the broken down glucose our body produces energy, carbon dioxide and water.
The physiology of the Muscular System
The muscular system is related to the energy metabolism. This is where the muscle contracts things using energy. The energy comes mainly from glucose and the glucose and oxygen is carried out throughout the blood.
There are different kinds of muscle fiber groups. They are all depending on what kind of tissue they are. The different types can be skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscle is known as contraction. Just before a muscle fiber can contract they have to be able to receive a reaction from the nerve cell.
Within the muscular system our muscle fibers are protected by a plasma membrane. This is known as a tube which is passed the muscle fibers through from one side to the other. When the tube is passing through from one side to the other this is known as transverse tubules.
The nuclei of the muscle fibers are located at the edges of the fiber. Each single fiber should have nuclei’s.

Explain how the body system interrelate with each other
The body structure works together in numerous means, such as; when an individual trains their somatic