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Cards In This Set
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Cardiorespiratory system
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A system of the body composed of the cardiovascular and respiratory systems.
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Cardiovascular system
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A system of the body composed of the heart, blood, and blood vessels.
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Heart
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A hollow muscular organ that pumps a circulation of blood through the body by means of rhythmic contraction. Has 4 hollow chambers.
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Mediastinum
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The space in the chest between the lungs that contains all the internal organs of the chest, except the lungs.
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Atrium
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The smaller superior chamber of the heart that receives blood from the veins and forces it into the ventricles
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Ventricle
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The larger inferior chamber of the heart that receives blood from its corresponding atrium and, in turn, forces blood into the arteries.
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Right Atrium
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Gathers deoxygenated blood returning to the heart from the entire body.
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Left Atrium
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Gathers reoxygenated blood coming to the heart from the lungs.
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Ventricles
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Main pumps in the heart.
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Where is the heart located?
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Positioned obliquely in the center of the chest, lying anteriorly to the spine and posteriorly to the sternum-flanked laterally by the lungs.
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What does the cardiorespiratory system provide?
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They provide the tissues of the kinetic chain with oxygen, nutrients, protective agents, and a means to remove waste by-products.
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Heart muscle
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Termed cardiac muscle which is made up of fibers that are shorter and more tightly connected than skeletal muscle.
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The conduction system
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Means by which the muscle fibers are activated. It has a built-in contraction rhythm, and the fibers with the highest rhythm determine the HR.
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The conduction system includes:
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The sinoatrial(SA) node and atrioventricular node(NA).
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Sinoatrial node
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Located in the right atrium, is the pacemaker for the heart as it initiates the heartbeat.
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