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Circulatory System

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Mason T.

on 23 February 2015

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Transcript of Circulatory System

The Circulatory System
How can you keep your circulatory system healthy?
Vitamin E will help your arteries supple
Don't Smoke! Smoking will clog your arteries
Eat fruits and vegetables, they will give you antioxidants - which are very good for you heart
Eating fish instead of red meat is also very good for your heart
Interesting Facts
It takes only 20 seconds for a red blood cells to circle the whole body
The heart beats around 3 million times in the average persons lifetime
If all the blood vessels in your body were laid end to end they would extend for 60,000 miles
What is the main
function of the
circulatory system?
The main function of the circulatory system is to deliver blood, nutrients, water, and oxygen to the cells in the body. It also carries away wastes such as carbon dioxide.
The heart pumps nutrients and oxygen through the blood vessels. The blood vessels go through the body, so each cell gets as much oxygen and nutrients as it needs.
How do the organs work together to achieve the function of the circulatory system?
What body system works closely with the circulatory system?
The circulatory system works closely with the respiratory system. The respiratory system gives oxygen to the lungs, then the oxygen goes to the circulatory system which gives oxygen to the blood cells.
What are the Major Organs?
The two major organs in the circulatory system are the heart and the blood vessels. The heart is a hollow organ, about the size of a fist, located behind the breastbone, inside your rib cage. Its main function is to pump blood through the body without getting tired. The reason it doesn't is because it's made of cardiac muscle.
The heart has two phases, or modes, relax and contract. When the heart relaxes, the right ventrical relaxes to take in blood, while the left ventrical relaxes to take in new oxygen-rich blood straight from the lungs. Then the heart contracts and the used, oxygen-poor blood from the organs through the right atrium and ventrical to the lungs. During this, the left ventrical contracts as well and is pushed out.
What types of diseases affect the circulatory system?
Arteriosclerosis- This is a disease where fat deposits on the sides of artery walls and restricts blood flow and may cause a heart attack.
Hypertension- This, also known as high blood pressure, causes the heart to work harder and causes a heart attack, stroke, and internal bleeding.
Aortic Aneurysm- When an aorta comes apart anywhere in the body it causes really bad internal bleeding and/or death.
Blood Vessels
The main function of the blood vessels is to transport blood. The three things included in the them is the veins, capillaries, and arteries. The arteries transport the blood out of the heart into the capillaries, where the capillaries then exchange substances between the body cells and the blood. Once that is done the blood is sent through the body, then once it's used it is sent back to the heart in the veins.
The part you can't see with the naked eye is what's in the blood. About half (53%) the blood is actually made of plasma, a substance mostly made of water but has some calcium and sugar. Also there are little fragments of blood cells, called platelets, that help to clot wounds by building up proteins
Different kinds of blood cells
There are two different kinds of blood cells, red and white. Red blood cells make up about 45% of our blood. Their job is to transport nutrients and oxygen through the body and to get rid of carbon dioxide. Their shape is sort of like a doughnut without the hole all the way through.
White blood cells are very important. Sadly, they only make up about 2% of our blood. They defend us from disease and infection by surrounding and attacking harmful cells. There are two kinds of white blood cells. (T and B)
T-cells identify pathogens and diseases, even though really they recognize the antigens in each pathogen. There are tens of millions of them, each recognizing different pathogen.
B-cells produce proteins, called antibodies, to help fight the identified pathogens and diseases. They piece together like a puzzle with the antigens inside the pathogens to mark them for destruction!
What diseases affect the body?(cont...)
HIV- It is a virus that attacks T. cells, and reproduces inside it. It is the only virus that attacks T cells directly, destroying them. The body then can't fight against the disease. Since the T cells are destroyed, B cells cannot be told to create antibodies to destroy virus. HIV can be transported to other parts of the body through the blood stream.
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