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CiRCULATORY SYSTEM;

CiRCULATORY SYSTEM;. By: Amber Steen & Kael Massie. What is the circulatory system ?. Organ system that is made up of the vessels and muscles that help control the flow of blood through out the body. Blood;. Blood cells are composed of fluid, cells & fragments of cells.

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CiRCULATORY SYSTEM;

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  1. CiRCULATORY SYSTEM; By: Amber Steen & Kael Massie

  2. What is the circulatory system ? • Organ system that is made up of the vessels and muscles that help control the flow of blood through out the body.

  3. Blood; • Blood cells are composed of fluid, cells & fragments of cells. • Plasma is the fluid portion of blood & makes up about 55% of its total volume • Red blood cells are round, disk-shaped cells that carry oxygen to body cells. These cells contain an iron protein molecule called Hemoglobin. • White blood cells protect your body from harmful & foreign diseases.

  4. Different blood groups; • There are 4 different types of blood groups : A, B , AB & O. • Difference in blood groups is due to the presence or absence of proteins called antigens. • Antigens are substances that stimulate an immune response in the body. Antibodies are proteins that are shaped to correspond with different blood surface antigens. • Platelets are small cell fragments that help to clot blood after an injury; if the injury is too severe then a blood transfusion could be necessary • That’s why its good to know your blood type.

  5. Blood vessels; • Blood vessels are the main way of transporting blood. • Three types of blood vessels are : Arteries, capillaries & veins. • Arteries are large , thick-walled, muscular, elastic blood vessels that carry blood AWAY from the heart • Capillaries are microscopic blood vessels with walls that are only one cell thick • Veins are large blood vessels that carry blood from the tissues TOWARD the heart.

  6. The heart; • The hearts main function is to keep blood moving constantly throughout the body • All mammalian hearts have 4 chambers, including ours. • The 2 upper chambers are the atria, & the 2 lower chambers are the ventricles. • Blood that is poor in oxygen enters the right atrium from two large veins called venae cavae. • The left ventricle then pushes oxygen rich blood from the left ventricle out of the heart through the aorta to the rest of the arteries in the body.

  7. Heartbeat regulation; • Some arteries are so close to the surface that you can actually feel the blood as it is moving through them; • such as the radial artery in the arm & the carotid artery in the jaw • A surge of blood through an artery is called a pulse. • Blood pressure is the force that the blood exerts on the blood vessels • Blood pressure rises & falls as the heart contracts and then relaxes.

  8. Works ciited; • http://www.globalclassroom.org/hemo.html http://hes.ucfsd.org/gclaypo/circulatorysys.html

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