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cardiovascular
| Term | Definition |
|---|---|
| platelets | small fragments of megakaryocytes that assist in blood clotting >1% total volume |
| plasma | liquid part of the blood 55% of total volume |
| hematopoiesis | process of blood cell formation that occurs in the red blood marrow |
| hemostasis | process of stopping blood flow |
| macrophage | large white blood cell that engulfs foreign particles |
| phagocytosis | ingestion of materials by phagocytes |
| pH | 7.35-7.45 |
| temperature | 38 Celsius 100.4 Fahrenheit |
| erythrocytes | RBC transports oxygen with hemoglobin 44% total volume |
| leukocytes | WBC protects body against pathogens 1% total volume |
| 11,000+ WBC | sign of bacterial or viral infection |
| leukopenia | abnormally low number of WBC |
| neutrophils | granulocyte, act as phagocytes at an infection |
| eosinophils | granulocyte, fight allergies and parasitic worms |
| basophils | largest granulocyte, responsible for inflammatory response |
| lymphocytes | agranulocyte, found in lymphatic tissue |
| monocytes | agranulocyte, macrophage for chronic infection |
| thrombus | clot usually developing in the legs that can block blood flow, break free= embolus |
| thrombocytopenia | not having enough circulating platelets |
| hemophilia | hereditary bleeding disorder resulting from a lack of clotting factors |
| aorta | largest artery |
| vena cavae | major veins that drain back into the heart |
| brachiocephalic artery | serves the brain, muscles, and skin of the head and neck |
| superior mesenteric artery | serves small intestine and parts of the large intestine |
| great saphenous veins | longest veins in the body |
| hepatic portal vein | drains digestive tract and carries blood to the liver |
| SA node | pacemaker |
| diastole | when the hearts relaxed |
| systole | when the heart contracts |
| epinephrine | hormone that can increase heart rate |
| ventricles | contract to push blood out of the heart |
| atria | receive blood and arent important to contraction |
| pericardium | double sac membrane to protect the heart |
| epicardium | external surface of the heart |
| parietal pericardium | protects and anchors the heart |
| myocardium | rings of cardiac muscle |
| endocardium | inner layer of endothelium (heart wall) |
| sinus venosus | becomes the right atrium, coronary sinus, and SA node |
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