Circulatory+System

=The Circulatory System = =By. Vivian Chen = __What organs invovled in the Circulatory system?__

All humans need body systems to survive. There is a total of 11 body system in a human’s body! Today, I will tell you about one of the most important system in our body. The Circulatory system includes the heart, blood and blood vessels. The heart is located a little left of middle of chest. Heart is also a muscle that’s about a fist big. However, why does the Circulatory system so helpful to our body? What are their job and purpose in our human body? So, let’s find out together about the purpose of our Circulatory system!

__What are the purpose and job of this system?__ The Circulatory system is also our body’s deliver system. It delivers oxygen and nutrients to our cells, bones, skin, and many other organs, also help carry away the wastes in our body! the four chambers of our heart are the "right atrium", "right ventricle", "left arium" and the "left ventricle". These four chambers all work as a group. The right ventricle in our heart will receives blood from the body then pumps it to the lungs. In the other hand, the left side will receives blood from the lungs and pumps it to out of the body. The two side of the ventricle does the totally opposite job. Now, put your hand on the right side of your chest, can you feel your heart beating? It should be beating, because if it isn’t you shouldn’t be reading about this article about your Circulatory system! So, how does the heart beat? Before each beat you fell, the heart is fills with blood. After, its muscle contrasts to squirt the heart along. However, don’t think this is such an easy job, because your heart does this continuously all day and night long! As I have mentioned a while ago about how ventricles in our heart receives the blood. The ventricles are the two chambers on the bottom of the heart. The atria fill with blood then dump it into ventricles. Next, the ventricles pump the blood out the heart. Now, you see the relationship between our heart’s atria and ventricles?

Now, it is time to talk about our heart valves. The two heart valves are the mitral valves a nd the tricuspid valves. The job of these two heart valves let blood flow from our heart atria to our heart ventricles. In our heart there are also two more valves. The other two are call the aortic valves and the pulmonary valves. These two heart valves help control the flow as the blood leave our heart. However, these four valves both have the same and important job in our heart. They both help our blood flowing forward. When they are “open “they let the blood move ahead and when they close quickly, it helps our blood from flowing backward. All these processes that are happing in our heart do a huge job on making us a healthier body. Our body also needs steady supply of blood to work right. Humans also need healthy blood to have healthy cells. Therefore, human body will definitely need oxygen in our blood and cells. Without oxygen our cells will die. But don't worry, because our heart is really good at doing this kind of job. The left side of the heart send oxygen of rich blood out then send it to our body. however, if our oxygen-rich blood doesn't circulate them we will die! What is circulation? "Circulation" is the movment that move through our body, heart and cells! Now, do you understand how important our circulatory system is!

__What are some diseases or problem that occur in this system?__

You might had wondered about what are some problem that occur in the Circulatory system? Some adults get heart problems, for example, the most common one is the "heart attack". Do you konw some kids your age or even younger gets heart problem, too? Now, lets me tell you some of the problem that occur in the Circulatory system!

__children:__

Have you ever heard about " heart murmur "? This is a heart problem that might occur in the children's circulatory system. What is heart murmur? Have you been to a doctor before? If you watch carefully, you might notice that some time the doctor takes out a special tool. these tool help the doctor hears sound between each of your heart beats! The heart murmur is when the doctor hears noisy sound between each beat. What do you do if you have heart murmur? Doctor usually think that it is nothing to be worry about, but sometimes it might cause more problems. __other problem:__
 * 1) __mitral valves__: keep blood in ventricle from going back to the left atrium

__Adults:__

We all know that " heart attack " is the most common heart problem that occur in our circulatory system! Heart attack is a block age that cuts blood flow, from a part to the heart. There are also many heart problems. For example, " Arteriosclerosis " is another kind of problem. "Arteriosclerosis" is when our arteries turn thickned and no longer flexible.

__Other problems:__ __Sovling problems__ Do be too worry if you have all these kind of heart problems because there are always some ways to solve them. For example, you can go to the doctor for some testing and find out more about you heart and heart vessels, see if they are working well. __ ﻿ __ __ kinds of Testing: __
 * 1) __Atherosclerosis:__ Build up cholesterol and fat that narrower. Therefore, there will be less space for blood to flow through.
 * 2) __ Angina: __ When feel the pain in your chest because your heart isn't getting enough blood.
 * 3) __ Stroke: __ When your brain isn't getting enough blood due to the clot and bursts blood vessels.

__ More.... __ __ Kinds of surgeries: __ __ 5 Questions: __ 1. occur in __children__ 2. occur in __adults__
 * 1) __ Electrocadiogram: __ records heart's electrical activity
 * 2) __ Echocardiogram: __ sond waves- diagnose heart problems
 * 3) __ Stress test: __ patient -exercises while the doctor checks he/her's heart muscle reacts
 * 1) __ Catheterization __
 * 2) __ Carotid __
 * 1) __ Angioplasty __
 * 2) __ Atherectomy __
 * 3) __ Bypass surgery __
 * 4) __ Pacemakers __
 * 5) __ Valve replacement __
 * 6) __ Carotid endarteretomy __
 * 1) How many organs are there in the Circulatory system?
 * 2) What are the 4 chambers of our heart?
 * 3) Dose the right ventricle does the __same__ job as the left ventricle? or the __opposite__?
 * 4) What is the relationship between our heart’s atria and ventricles?
 * 5) Name one of the heart problem:

__ My resources: __


 * __Discover kids(Yucky)__. Discover Communications. Janurary, 2011 . ||
 * 2. []

__kidshealth: your heart and circulatory system__. kids health. Janurary, 2011 . ||
 * ===[[image:214_image.jpg width="223" height="260"]]Our heart [[image:213_image.gif width="200" height="234"]]The movement of blood!===

Resources of my pictures:
__1. kidshealth: your heart and circulatory system__. kids health. Janurary, 2011 . ||