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Phlebotomy.C7
The Circulatory System in Depth
| Term | Definition |
|---|---|
| Antigen | Protein that marks foreign substances and causes immune response | bound with antibodies |
| Blood type | Determined by the presence or absence of specific antigens in a person's blood |the surface of red blood cells have certain antigens attached |
| Pulmonary circuit | The blood vessels of the body that circulate blood between the heart and the lungs |
| Systemic circuit | The blood vessels of the body that circulate blood vessels between the heart and the rest of the body (not lungs) |
| plasma | The liquid component of blood | 55% total blood volume | Clear, Straw - colored fluid | 91% water, 9% dissolved substances (.. proteins, gasses, hormones, nutrients) |
| Formed elements | Solid components of blood | 45% total blood volume | Includes red blood cells, white blood cells, and platelets |
| Blood | Transports gasses, nutrients, wastes, and hormones throughout the body. protects against infections, forms clots to stop blood loss In the case of injury, regulates body temperature, and helps the body maintain homeostasis |
| Stem cells | cells generated from bone marrow and can become any type of cell |
| Erythrocyte | Red blood cell |
| Leukocyte | White blood cell |
| Thrombocyte | platelet |
| Neutrophil | Generated from stem cells in the bone marrow | 50% - 65% of all white blood cells | type of white blood cell | body’s first defense against illness. |
| Eosinophil | A type of white blood cell. |
| Basophil | A type of white blood cell. |
| Granulocyte | The 3 types of white blood cells together | Neutrophils, eosinophils, and basophils | Lives < 1 full day and must be generated constantly |
| Lymphocyte | 20% - 30% of all white blood cells | boosts the body’s immune system | Originates in bone marrow | |
| B cell | Produces antibodies with the help of signals from T cells |
| T cell | B cells that have moved to the thymus an organ in the lymphatic system and become T cells to regulate immune responses Or fight infected cells directly |