Anatomy and Physiology - Energy Metabolism

1339 Words Feb 3rd, 2015 6 Pages
Unit 5: Anatomy and Physiology
(P4) Explain the physiology of two named body systems in relation to energy metabolism in the body

In this task I am going to discuss the three systems involved in energy metabolism in the body.
The chemical equation for cellular respiration is:
C6H12O6 + O2 = E + CO2 + H2O
OR
Glucose + Oxygen = Energy + Carbon Dioxide + Water
In order to release energy we need glucose which is a simple carbohydrate that is produced after digestion of food and we also need oxygen. Once the food has been broken down it then needs to be transported throughout the body. For this reason, there are three systems involved in cellular respiration. These three systems are known to be the digestive, respiratory and
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The millions of alveoli create a large surface area important for gaseous exchange to take place. These surfaces are permeable due to the thin and moist walls of the alveoli and the blood capillaries. The hairs in the nose act as filters and as air passes through the nasal cavity it helps to warm up the air before it enters the lungs.
Gaseous exchange takes place in the millions of alveoli located in the lungs. These alveoli are surrounded by blood capillaries so that the oxygen is able to pass from the alveoli into the bloodstream so it can then be carried by the red blood cells throughout the body. Similarly, the carbon dioxide from the bloodstream is able to pass through into the alveoli so it can then be exhaled. This process is made possible due to the concentration gradient of the gases across the gas exchange surfaces.

Circulatory System
One of the main functions of the circulatory system is transportation in the body. This system is made up of the heart, blood and blood vessels; such as the arteries, veins and capillaries. Blood itself is made up of plasma, red blood cells, white blood cells and platelets. Plasma is responsible for carrying dissolved nutrients such as glucose and also waste materials including carbon dioxide. The red blood cells are responsible for carrying oxygen as they contain haemoglobin. Therefore the circulatory system has an important
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