Phsio Essay

892 Words Feb 6th, 2016 4 Pages
Though metabolism doesn't consist solely of the reactions that burn nutrients like carbohydrates, fats and protein, these are perhaps the most widely known of the metabolic reactions. Your metabolism, however, actually includes every chemical reaction that takes place in your body, Drs. Mary Campbell and Shawn Farrell explain in their book "Biochemistry." Some of these reactions burn molecules to produce energy, while others use energy to make larger molecules that the cells use for a variety of purposes, both functional and structural.

The cardiovascular system consists of the heart, blood vessels and blood. It's a relatively simple -- though critically important -- body system, in that it operates much like a pump and series of pipes
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These two chambers are further divided into the thin walled atrium above, and a thick walled ventricle below, making four chambers. Between each pair of chambers are valves preventing any back flow of blood. Blood vessels leaving the heart generally carry oxygenated blood through vessels known as arteries. These are large, hollow elastic tubes with thick muscular walls that are designed to withstand the high pressure with the blood leaving the heart. Their size gradually diminishes as they spread throughout the body, ultimately reaching fine, hair-like vessels known as capillaries. Blood vessels that return blood to the heart are known as veins which generally carry de-oxygenated blood to the heart. They are elastic tubes containing valves to help prevent back flow of blood. Blood is forced through arteries by the pressure from the heart whereas venous flow is aided by muscular contraction.

The only two exceptions to the above are the pulmonary artery, which carries de-oxygenated blood from the heart to the lungs, and the pulmonary vein, which carries oxygenated blood from the lungs to the heart. The circulation is divided into two principle systems known as the general or systemic circulation, that is the circulation around the body, and the pulmonary circulation to and from the lungs.

Blood

The fluid that surrounds tissue cells throughout the body is called interstitial fluid and is serviced by blood transporting oxygen and nutrients to it whilst lymph removes

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