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Cardiovascular System
the system made up of the heart (cardio) and the blood vessels (vascular); the circulatory system.
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atria
the two upper chambers of the heart. There is a right atrium (which receives the unoxygenated blood returning from the body) and a left atrium (which receives oxygenated blood returning from the lungs).
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ventricles
the two lower chambers of the heart. There is a right ventricle (which sends oxygen-poor blood to the lungs) and a left ventricle (which sends oxygen-rich blood to the body).
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venae cavae
the superior vena cava and the inferior vena cava. These two major veins return blood from the body to the right atrium.
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valve
structure that opens and closes to permit the flow of a fluid in only one direction.
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cardiac conduction system
a system of specialized muscle tissues which conduct electrical impulses that stimulate the heart to beat.
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artery
any blood vessel carrying blood away from the heart.
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coronary arteries
blood vessels that supply the muscle of the heart (myocardium).
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pulmonary arteries
the vessels that carry blood from the right ventricle of the heart to the lungs.
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carotid arteries
the large neck arteries, one on each side of the neck, that carry blood from the heart to the head.
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femoral artery
the major artery supplying the leg.
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brachial artery
artery of the upper arm; the site of the pulse checked during infant CPR.
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radial artery
artery of the lower arm. It is felt when taking the pulse at the wrist.
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posterior tibial artery
artery supplying the foot, behind the medial ankle.
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dorsalis pedis artery
artery supplying the foot, lateral to the large tendon of the big toe.
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arteriole
the smallest kind of artery.
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capillary
a thin-walled, microscopic blood vessel where the oxygen/ carbon dioxide and nutrient/ waste exchange with the body's cells takes place.
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venule
any blood vessel returning to the heart.
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pulmonary veins
vessels that carry oxygenated blood from the lungs to the left atrium of the heart.
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plasma
fluid portion of the blood.
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red blood cells
carry oxygen to and carbon dioxide away from the cells.
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white blood cells
produce substances that help the body fight infection.
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pulse
rhythmic beats caused as waves of the blood move through and expand the arteries.
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platelets
components of the blood; membrane-enclosed fragments of specialized cells.
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periperal pulses
the radial, brachial, posterior, tibial, and dorsalis pedis pulses, which can be felt at peripheral (outlying) points of the body.
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central pulses
the carotid and femoral pulses, which can be felt in the central part of the body.
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blood pressure
the pressure caused by the blood exerting force against the walls of blood vessels. Usually arterial blood pressure is measured.
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systolic blood pressure
pressure created in the arteries when the left ventricle contracts and forces blood out into circulation.
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diastolic blood pressure
pressure in the arteris when the left ventricle is refilling.
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perfusion
supply of oxygen to and removal of wastes from the cells and tissues of the body as a result of the flow of blood through the capillaries.
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hypoperfusion
inadequate perfusion of the cells and tissues of the body caused by insufficient flow of blood through the capillaries. aka shock
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