Heart and Lungs

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Shonna Seddon
Anatomy & Physiology II
December 3, 2011

Heart & Lungs

The heart and lungs are two separate organs, but are “intimately connected” for the proper function of a healthy body. With the function and purpose of both organs, one cannot work without the other. The lungs inhale oxygen, and then exhale the carbon dioxide and other wastes out of the body. With the heart, it pumps blood through the lungs to pick up the oxygen and deposit the waste from traveling through the body.

First we start off describing the functions of the lungs and its importance to the human body. “Your lungs make up one of the largest organs in your body, and they work with your respiratory system to allow you to take in fresh air, get rid of the stale air, and even talk.” As you breathe in through your mouth and nose, the air travels down the trachea. In your trachea, there are tiny hairs, called cilia, which help keep mucus and dirt that you breathe in out of your lungs.

Once through there, oxygen travels through the bronchi, bronchus, and then the bronchioles. At the end there are tiny air sacs called alveoli where blood travels through capillaries and gases are exchanged. The oxygen will then attach to hemoglobin to be transported through the circulatory system.

Once “your cells have used the oxygen they need, and your blood is carrying carbon dioxide and other wastes that must leave your body. The blood comes back through the capillaries and the wastes enter the alveoli. Then you breathe them out in the reverse order of how they came in, which would be the air goes through the bronchioles, out the bronchi, out the trachea, and finally out through your mouth and nose.”

Now we will talk about the heart and important functions it does for us. The heart is a muscle that is located slightly to the left in your chest, and is about the size of your fist. It pumps blood through your body that is enriched with oxygen and nutrients that your body needs; also,...
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