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15 Cards in this Set
- Front
- Back
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two upper chambers of the heart that contract at the same time during a heatbeat
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atriums
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two lower chambers of the heart, that contract at the same time, during a heartbeat
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ventricles
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flow of blood to and from the tissues of the heart
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coronary circulation
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flow of blood through the heart to the lungs and back to the heart
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pulmonary circulation
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largest part of the circulatory system, in which oxygen-rich blood flows to all the organs and body tissues except the heart and lungs, and oxygen-poor blood is returned to the heart
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systemic circulation
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blood vessel that carries blood away from the heart, and has thick, elastic walls made of connective tissue and smooth muscle tissue
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arteries
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blood vessel that carries blood back to the heart, and has one-way valves that keep blood moving toward the heart
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veins
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microscopic blood vessel that connects arteries and veins; has walls one cell thick, through which nutrients and oxygen diffuse into body cells, and waste materials and carbon dioxide diffuse out of body cells
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capillaries
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chemical in red blood cells that carries oxygen from the lungs to body cells, and carries some carbon dioxide from body cells back to the lungs
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hemoglobin
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irregularly shaped cell fragment that helps clot blood and releases chemicals that help form fibrin
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platelets
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liquid part of blood, made mostly of water, in which oxygen, nutrients, and minerals are dissolved
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plasma
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tissue fluid that has diffused into lymphatic cappilaries
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lymph
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carries lymph through a network of lymph cappilaries and vessels, and drains it into large veins near the heart; helps fight infections and diseases
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lymphatic system
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bean-shaped organs found throughout the body that filter out microorganisms and foreign materials taken up by the lymphocytes
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lymph nodes
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a type of white blood cell that fights infection
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lymphocytes
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