Thursday, December 20, 2012

Science: Circulatory System (Cardiovascular system)

Dear world,

I am doing a project for school.  I am going to tell you the cycle of the blood through the Circulatory system.

These are the components of blood.
The Circulatory System are made up of three things the Heart, blood vessels, and blood. The heart is the most important thing in the Cardiovascular System. The heart pumps blood through the body it is the strongest muscle and it never gets tired. All cells in the body are made in bone marrow. All red blood cellswhite blood cells, and platelets are made in bone marrow. The differences from veins, arteries, and capillaries are simple.  Arteries carry red blood away from the heart and they are big in size. Capillaries are where arteries and veins are connected together, are middle sized. Vein are the blood vessels that lead blood back to the heart. All capillaries, arteries, and veins are the same because they all go through the body, all blood vessels, and they all pump blood through the body. Bone marrow is important because it is where blood cells are made. Blood is made up of four substances white blood cells, red blood cell, plasma, and platelets.  The white blood cells fight disease so we won't get sick, about 100 thousand of them in one drop of blood. A red blood cell is a blood cell's job is to transport oxygen there are about 50 million red blood cell in a drop of blood. Platelets are the things in you blood that make your blood clot or dry out it is what make scabs,  the are about 2.5 million platelets in a drop of blood. Plasma is the last thing that makes up blood, Plasma is made of 90% water, remain 10% is minerals, sugars, proteins, plasma is what makes blood liquid and flowing. The pulmonary artery is where the blood goes to to get carbon dioxide to after it trip around the body. In the path of the circulatory system through the right side of the heart the blood that that needs more oxygen (blue blood) can go through the superior vena cava or trough the inferior vena cava. After the blood goes in one of those way it gets into a entrance in the heart called the right atrium. After it get in there it wait till it is full of blood than it goes through a valve that pushes the blood in to the next thing. The next step is the blood goes into the right ventricle and up through the Pulmonary Artery to do the same over and over again. Now lets talk about the right side of the heart.  When the blood comes from the lungs the first thing that happens is the blood comes through the pulmonary arteries into the the left atrium. After the blood goes into the left atrium it goes through the valve and into the ventricle. The blood goes through the aorta and goes to transport the rest of the blood through the body. The heart beats about 60-100 times per minute. About 2 million blood cells die every day. The heart pumps 5 to 6 thousand quarts of blood a day. There are four types of blood A, B, AB,O. When blood is oxygen rich the blood is a bright red. When the blood doesn't have any oxygen at all it is a blue color. Red blood cell actually have no nucleus at all. Cardio means- heart and Vascular mean vessel.
This is where the blood goes through out your body.
This bone marrow cut away veiw.
This is the path the blood goes through the heart.
This is the way blood goes through your body

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