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22 Cards in this Set
- Front
- Back
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What does the cardiovascular system do?
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It transports materials to and from your cells.
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What does "cardio" mean?
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Heart
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What does "vascular" mean?
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Vessel
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What are the 3 parts that make up the cardiovascular system?
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blood, heart, blood vessels
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What is blood?
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Connective tissue made up of 2 types of cells, cell parts, and plasma
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What is plasma?
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The fluid part of blood.
Mixture of water, minerals, nutrients, sugars, proteins, & other substances. RBCs, WBCs, & platelets float in plasma. |
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What are red blood cells?
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Each RBC contains hemoglobin, which gives RBCs their color.
They are the most abudnant cells in blood. They contain oxygen & carry it throughout the body. They're made in bone marrow. No nucleus. Live about 4 months. |
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What are white blood cells?
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WBCs destroy pathogens & help clean wounds.
Some WBCs engulf pathogens. Others release antibodies. Made in bone marrow. |
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What are platelets?
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Platelets are pieces of larger cells found in bone marrow.
Last 5-10 days. Platelets clump together in damaged areas & form a plug that helps reduce blood loss. Release chemicals that react with proteins in plasma & cause fibers to form, helping blood clot. |
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What is the heart?
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Muscular organ in center of chest cavity.
Pumps oxygen-poor blood to lungs & oxygen-rich blood to the body. It is the size of your fist. |
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What are the upper chambers of the heart called?
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Atria (plural). Each is an atrium.
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What are the lower chambers of the heart called?
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Ventricle(s).
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What are blood vessels?
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Hollow tubes that transport blood. There are 3 types: arteries, capillaries, veins.
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What are arteries?
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Blood vessels that direct blood away from the heart. Their walls contain smooth muscle. As blood pumps, they are strong enough to withstand the pressure.
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What is your pulse?
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The rhythmic change in blood pressure.
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What are capillaries?
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Smallest blood vessels.
1/10 the diameter of a strand of human hair. One cell thick--blood cells pass through them in single file. |
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What are veins?
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Blood vessels that direct the blood back to the heart. When skeletal muscles contract, they squeeze veins and help push blood toward the heart.
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What is pulmonary circulation?
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Blood flow between your heart & lungs.
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What is systemic circulation?
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Blood flow between the heart and the rest of the body (not lungs).
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What is blood pressure?
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The force exerted by blood on the inside walls of a blood vessel.
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What is systolic blood pressure?
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The pressure inside large arteries when the ventricles contract.
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What is diastolic blood pressure?
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The pressure in the arteries when the ventricles relax.
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