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29 Cards in this Set
- Front
- Back
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atria
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chambers that receive blood returning to the heart.
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ventricle
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thick walled chambers that pump blood away from the heart (below the atrium.)
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vena cava
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collect all of the oxygen-poor blood from the body.
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aorta
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a large artery that carries blood away from the heart.
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coronary arteries
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supply the heart with oxygen-rich blood.
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sinoatrial node
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a small cluster of cardiac muscle cells.
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blood pressure
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the force exerted by blood as it moves through blood vessels.
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Pulse
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a series of pressure waves within an artery caused by the contractions of the left ventricle.
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heart attack
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when an area of the heart muscle stops working and dies.
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stroke
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when an area of the brain dies.
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pharynx
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a muscular tube in the upper throat; serves as a passageway for air and food.
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larynx
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voicebox; passageway for air; epiglottis covers this.
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trachea
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wind pipe; a long, straight tube in the chest cavity.
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bronchi
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two smaller tubes within the trachea that lead to the lungs.
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diaphragm
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a muscle spanning the rib cage under the lungs; aids in respiration.
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alveoli
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within the lungs; clusters of tiny sacs.
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cardiovascular system
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functions like a network of highways; connects the muscles and organs of the body through an extensive system of vessels that transport blood, a mixture of specialized cells and fluid.
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arteries
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blood vessels that carry blood away from the heart.
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capillaries
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tiny blood vessels that allow the exchange of gases, nutrients, hormones, and other molecules in the blood.
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veins
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blood vessels that carry blood back to the heart; contains valves.
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valve in veins
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a flap of tissue that ensures that blood that passes through does not flow backwards.
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lymphatic system
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collects and recycles fluids leaked from the cardiovascular system. It is involved in fighting infections.
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plasma
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60 percent of the total volume of blood; the liquid portion of blood.
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red blood cells
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cells that carry oxygen; most of the cells that make up blood are these.
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anemia
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a condition in which the oxygen-carrying capacity of the blood is reduced.
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white blood cells
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cells that defend the body against disease.
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platelets
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cell fragments that play an important role in blood clotting.
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ABO blood group system
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used to determine blood type. Under this system, the primary blood types are A, B, AB, and O. The letters A and B refer to antigens on the surface of red blood cells.
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Rh factor
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another important antigen on the surface of red blood cells. Persons who have this protein are Rh+. Persons who lack it are Rh-.
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