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Circulatory System
Blood and Circulation Vocab
Term | Definition |
---|---|
heart | organ made of cardiac muscle tissue, located behind the sternum and between the lungs |
atrium | upper chambers of the heart--right atrium and left atrium |
ventricle | lower chambers of the heart--right ventricle and left ventricle |
coronary circulation | the flow of blood to and from the tissues of the heart |
pulmonary circulation | the flow of blood through the heart, to the lungs, and back to the heart |
systemic circulation | the movement of oxygen-rich blood to all of your organs and body tissues (except the heart and lungs) |
artery | blood vessels that carry blood away from the heart |
vein | blood vessels that carry blood back to the heart |
capillary | microscopic blood vessels that connect arteries and veins |
blood pressure | the pressure your blood puts on artery walls |
cardiovascular disease | any disease that affects the heart, blood vessels, and blood; include atherosclerosis, hypertension, and heart failure |
atherosclerosis | one type of cardiovascular disease where fatty deposits of cholesterol build up on arterial walls |
hypertension | when blood pressure is consistently higher than normal (aka high blood pressure); causes extra strain on the heart when it pumps blood |
plasma | liquid part of blood; made mostly of water |
hemoglobin | molecule that carries oxygen and carbon dioxide; makes up red blood cells |
platelet | irregularly shaped cell fragments that help clot blood |
white blood cells | fight bacteria, viruses, and other invaders of your body |
red blood cells | special cells with no nucleus that carry oxygen and carbon dioxide to and from cells; made of hemoglobin |
lymph | excess tissue fluid that diffuses into lymphatic capillaries |
lymphatic system | carries lymph through a network of lymph capillaries and vessels, and drains it into large veins near the heart' helps fight infections and diseases |
lymphocyte | a type of white blood cell that fights infection |
lymph node | bean-shaped organs found throughout the body that filter out microorganisms and foreign materials taken up by the lymphocytes |