Welcome to the amazing homepage about the cardiovascular system!

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This information is from:

What cardiologists do
**Cardiologists** study the circulatory system and
the way blood travels through the heart, and the
functions of the heart.

What is the circulatory system?
The circulatory system is the way blood travels through
the blood vessels and the heart.

The basic chambers of the heart:
There are four chambers in the heart. There are two
chambers on the top and two chambers on the
bottom. The top two chambers are called the atria. There's a left atrium and a right atrium. They
receive blood returning to the heart from the body and lungs. The bottom two chambers are the
ventricles. There is also a right ventricle and a left ventricle. The ventricles give the blood to the body
and lungs

The flow of blood through the body:
Your blood flows through your body and heart is the one which pumps your blood to all parts of your
body. Blood flows through your body using your blood vessels such as capillaries, veins and arteries. When the
Oxygen-poor blood goes to your lungs, the blood will be Oxygen-rich and will give oxygen to your whole body and does
this over and over again. This is a picture showing how the blood vessels look like:
external image figure8_lg.jpg

And this is what your blood vessels look like from inside:
external image vessel.gif


Check out this awesome site it will show you how the heart pumps, what different sounds the heart makes and how
fast the heart is pumping:

The path of blood:
First, the Oxygen-rich blood travel through veins to the Left Atrium of your heart.
The Oxygen-rich blood goes to the Left Ventricle and the heart pumps blood to artery and capillaries.
While Oxygen-rich blood travel through capillaries, the blood gets Carbon dioxide, so the blood turned to
Oxygen-poor blood. The Oxygen-poor blood now travel through veins to the Right Atrium of your heart.
Then it travel to the Right Ventricle and your heart pumps the blood into arteries and go to your lungs.
The Oxygen-poor blood go into the capilaries of your lungs. The capilaries of your lungs give off oxygen
and get carbon dioxide and the blood turn back into Oxygen-rich blood. The Oxygen-rich blood travel
through veins again and get back to your heart. And your blood travel through your body all over again!
In other words, the whole of your heart's left side sends oxygen-rich blood to the body and the right side of
your heart receives\oxygen-poor blood. It then goes to the lungs where they take out the carbon dioxide
which we exhale.Then the oxygen-poor blood becomes oxygen-rich blood.

external image heartflow.gif
Picture from: http://www.pbs.org/wgbh/nova/heart/images/heartflow.gif

More facts about the heart:
The human heart is shaped like a cone. The narrower end of the heart points down and to the left side
of the chest. In an adult, the heart weighs about three-fourths of a pound and is about the size of a fist.
Major arteries, such as the aorta and pulmonary arteries, connect at the wider upper part of the heart.
If arteries become clogged with cholesterol and other fatty deposits (atherosclerosis), you may have a
heart attack or stroke.

Dr Arfan says....
Blood vessels
are part of circulatory system which functions to send blood to the whole body. There
are different type of blood vessels: arteries, arterioles, capillaries (the smallest blood vessels),
venules, and the veins. The most important types, are the arteries and the veins. The arteries carry
blood away from the heart. The largest artery in the human body is called the aorta, the aorta carries the
blood out of the heart. The veins carry blood back to the heart.

More info on Blood Vessels:

Click the link below and see the cool images of the different types of Blood Vessels and PUZZLES :
Blood vessel word search
Blood vessel hang-man
Blood vessel crossword
external image circulationgeneral.gif
Picture from: http://www.ama-assn.org/ama1/pub/upload/images/446/circulationgeneral.gif

Dr. Devyani says:
Find your heart rate! :

Even though your heart's inside your body, there's still a way to feel it beating. It's called the pulse! To find iy,
place one of your fingers on your skin. It works better if you place it on the side of your neck or on the inside of
your wrist. When you feel a beating under your skin, you'll know you've found yourpulse! To find out your heart rate,
take a watch and count how many beats you feel in one minute.When your sitting down, watching t.v., playing a board
game (resting), you'll probably feel about 70-100beats per minute. When you're excercising a lot, your body needs
more oxygen-filled blood. That'swhy your heart beats faster to supply the oxygen-filled blood to your body.
If you take your heart rateafter excercising, you'll feel a big difference. You'll be counting a lot more beats per minute!

There are two different types of ways to feel your pulse (below):
external image pulse.gif or external image Pulse%20neck.jpg

Pictuer from:http://www.beaumonthospitals.com/images/departments/heart/pulse.gif Picture from:http://www.la.ngb.army.mil/eprp/EPRP/doc%20photos/Pulse%20neck.jpg

Dr. David Says…

What The Heart Does

The Cardiovascular system is a system in which includes the heart, veins, arteries, lungs, capillaries and every
cell in the body. The heart acts as a pump for the body because it pumps blood around the body this is called
systematic circulation. It also pumps blood to the lungs to get oxygen this is called the pulmonary circulation.
When the heart pumps oxygen rich blood goes to the body from the arteries. Then they reach the capillaries
which walls are only 1 cell thick. Blood cells literally have to go single file though the capillaries. The capillaries
are thin for a reason it is so all the cells in the body can collect the oxygen from the blood. Did you know that
no cell in the body is more than 4 cells away from a capillary? After the oxegen poor blood passes through the
capillaries it travels through the vein back to the heart which pumps it to the lung to get oxygen and the whole
process starts again.

Why Should You Keep Your Heart Healthy

You should keep your heart and body healthy because if you do not you could have high cholesterol and your veins
and arteries might get blocked. You may then develop heart disease and then it is possible that you will have a heart attack.DPR100007226.jpg


The image comes from: http://www.wellesley.edu/Biology/Courses/111/ForOval.gif

Dr. Craig says…
The Cardiovascular system
The Cardiovascular system is one of the most important systems. The heart pumps oxygenated blood to the
body and pumps non-oxygenated blood to the lungs to get “re-oxygenated.” The tubes that carry blood are called
vessels. The vessels that carry blood to the heart are called veins, the vessels that carry blood to the body are
called arteries. There are three different kinds of cells in your blood. The first one is the red blood cell that carries
oxygen to your body. The second type of cell is the white blood cell that fights off infectious diseases.
The last cell is the platelet. When a vessel is cut open platelets create a web to force your blood to go out
of the cut (bleeding). While you bleed the platelets close the cut. A scab is formed when the blood dries creating a
shield for the platelets.

Dr. Nadia says...
The Cardiovascular system is the most important system in your body as it contains the heart which helps you live.
Many people in the world mostly die of heart disease. To prevent this disease, one must have time to exercise and
stay fit. The Cardiovascular consists of the heart, the lungs and all the arteries and veins. Veins and arteries are
tubes that contain blood. There are four types of blood groups. There are A, B, AB and O. O blood doesn't have
any antigens which is why it's the universal donor. That means that it can donate to any type of blood. AB blood
has A and B antigens which is why it's the universal recipient. That means that it can recieve from anyone.


external image heart.jpg

Blood is made out of 2 types of cells, cell parts and plasma. There are 3 cells that flow in plasma. Red blood cells, white blood cells, and platelets.

Red blood cells:
There are lots of red blood cells in your blood. Blood needs to have oxygen and it is their job to carry oxygen all around your body. Red blood cells are made in the middle part of your bone called bone marrow and only can live for 4 months.

White blood cells:
Their job is to kill bacteria viruses to keep your body healthy by destroying them. White blood cells are also made in bone marrow.

The job is to cover the blood vessels when you have a cut. They are preventing from bleeding by clumping together and that is why bleeding stops.

The picture is from:http://www.yksd.com/DistanceEdCourses/YKSDbiology/lessons/ThirdQuarterLessons/Chapter08/8-2/images/BloodComposition.jpg

click here for more informations about blood and blood cells
external image BloodComposition.jpg

For more info on the cardiovascular system click the links below!
More info on the heart
**Information about heart**

To play cardiovascular games, facts and many more, click the links below!
**Amazing Facts Of the Heart**
**Try our game "Open Heart Surgery," Now!**
**The Cardiovascular Quiz**
**Cardiovascular System Quiz**