Platelets: Platelets also called thrombocytes, say: THROM-buh-sytes are tiny oval-shaped cells that help in the clotting process. When a blood vessel breaks, platelets gather in the area and help seal off the leak. Platelets work with proteins called clotting factors to control bleeding inside our bodies and on our skin. Platelets survive only about 9 days in the bloodstream and are constantly being replaced by new platelets made by the bone marrow.
With each heartbeat, the heart pumps blood throughout our bodies, carrying oxygen to every cell. After delivering the oxygen, the blood returns to the heart. The heart then sends the blood to the lungs to pick up more oxygen. This cycle repeats over and over again. The circulatory system is made up of blood vessels that carry blood away from and toward the heart. As the heart beats, you can feel blood traveling through the body at pulse points — like the neck and the wrist — where large, blood-filled arteries run close to the surface of the skin.
Sometimes medicine can be given to help a person make more blood cells. And sometimes blood cells and some of the special proteins blood contains can be replaced by giving a person blood from someone else.
This is called a transfusion say: trans-FEW-zyun. People can get transfusions the part of blood they need, such as platelets, RBCs, or a clotting factor. When someone donates blood, the whole blood can be separated into its different parts to be used in these ways. Everybody's blood is red, but it's not all the same. See, Play and Learn Videos and Tutorials. Research Clinical Trials Journal Articles.
Resources Reference Desk Find an Expert. For You Children Teenagers. Start Here. Diagnosis and Tests. Related Issues. Blood Types American Red Cross. Videos and Tutorials. Red blood cell production Medical Encyclopedia Also in Spanish. Clinical Trials. Article: Nano-biosupercapacitors enable autarkic sensor operation in blood.
Blood -- see more articles. Blood is essential to life. It also transports metabolic waste products away from those same cells. There is no substitute for blood. It cannot be made or manufactured.
Generous blood donors are the only source of blood for patients in need of a blood transfusion. There are four basic components that comprise human blood: plasma, red blood cells, white blood cells and platelets. They are generated from your bone marrow at a rate of four to five billion per hour. They have a lifecycle of about days in the body. Platelets are an amazing part of your blood. Platelets are the smallest of our blood cells and literally look like small plates in their non-active form.
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