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The Human Body

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Emily Lehne

on 17 January 2013

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Transcript of The Human Body

The human body has many systems that work together to maintain the body's functions. In our unit, we have focused on the digestive, circulatory, respiratory, and excretory systems. Here is a demonstration of how the systems work together. The circulatory system carries the blood into the lungs. Here, the blood delivers carbon dioxide and picks up oxygen. The blood is pumped back into the heart, and then circulates to various parts of the body, and back to the heart. The trachea, aka the windpipe, carries air into the lungs. As air is carried into the lungs, oxygen is absorbed and carbon dioxide is released. When the human body exhales, the carbon dioxide is released from the body. As the circulatory system carries the blood around the body, the exchange of gases occurs in the alveoli of the lungs. The blood then carries the oxygen and delivers it to other parts of the body. The heart is a muscle that has 4 chambers (the left & right ventricles and the left & right atria). The 4 chambers work together to pump the blood throughout the body. The valves in the heart prevent the blood from flowing backwards, and keep it flowing in one direction. Acids in the stomach continue with the majority of chemical breakdown while muscle contractions in the stomach continue with mechanical breakdown. The stomach and intestines deliver the nutrients to the blood stream. The liver is the largest internal organ in the human body. This organ helps to remove dangerous toxins from the blood before they can damage other organs. It also produces bile, which assists in chemical breakdown. Next, the broken down food enters the small intestine, where 95% of nutrient absorption occurs. Water and some minerals are reabsorbed back into the blood in the large intestine. The waste is then stored in the rectum. In your digestive system, food is chemically and mechanically broken down so that nutrients can be better absorbed. Food enters the mouth, where mechanical breakdown begins to occur as you chew and saliva assists with chemical breakdown. The chewed food then enters the esophagus and is carried down to the stomach. For those that are not familiar with Prezi:
Click more in the bottom right hand corner.
Then click on full screen.
To progress to each part of the presentation, click the right arrow.
At any time in the presentation you can go back by clicking on the left arrow, or zoom in or out to see more or less of the material. Blood delivers waste to the kidneys, which
is then sent down the ureter tubes to the bladder.
The urine is stored in the bladder
until it is expelled
from the body.
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