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Structural Levels

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Structural Levels
There are four structural levels of the body. Cells, tissues, organs and organ system. Cells are the basic structure and make up tissues. Two or more tissues make up the organs and the organ system are 2 or more organs that function together. One of the main health benefits of exercising is that it helps normalize the glucose, leptin, insulin levels by increasing insulin/leptin receptor sensitivity. This optimizes our overall health and prevents chronic diseases. Exercising has the capability to increase the body’s organ systems. The body’s main physiological systems are the cardiovascular, respiratory, skeletal, digestive, endocrine, immune and nervous system. The skeletal System acts as a support and attachment sites for muscles and protects …show more content…
The heart is the main organ in the cardiovascular system. The heart is a muscle and performing physical exercises strengthens the heart, normalizes blood pressure and lowers a person’s risk of heart disease. Blood carries oxygen and nutrients to the blood and removes waste. Oxygen carrying capacity of blood is determined how much iron is in our blood. Iron is an important mineral that is necessary to create hemoglobin, that is the protein used by red blood cells to deliver oxygen and remove carbon dioxide in the muscle when exercising. The more iron in the blood, the greater the oxygen carrying capacity, the less iron in the blood, the weaker the oxygen capacity in the blood. For example, A person has been working-out vigorously and not giving he/herself enough time to recover and right amount of nutrient and wonders why he/she hasn’t seen any changes. This is mainly due lack of iron in the blood from overtraining. Hypertrophy in the heart is the enlargement and thickening of the walls of the left ventricle. A stronger heart reduces the resting heart rate during exercise because the heart is pumping more blood around the body. Which causes more oxygen to reach the working muscles when exercising. A marathon runner will need a stronger heart than a sprinter because the stronger the heart, the more blood will be pumped around the body and more oxygen will diffuse in to the working muscles to make the marathon runner run at a high intensity and longer
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