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A system of the body composed of the cardiovascular and the respiratory system
Cardiorespiratory system
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A system of the body composed of the heart, the blood it pumps and the blood vessels that transport the blood from the heart to the tissues of the body
Cardiovascular system
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A hollow muscular organ that pumps a circulation of blood through the body by means of rhythmic contraction
Heart
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The space in the chest between the lungs that contains all the internal organs of the chest, except the lungs
Mediastinum
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Similar to skeletal muscle this type of involuntary muscle is made of myofibrils containing actin and myosin that form crossbridges to cause contractions and is surrounded by a sarcolema, however the muscle fibers are shorter and more tightly connected than skeletal muscle. Thus contraction of one fiber can stimulate the others to contract synchronistically.
cardiac muscle
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The typical hear rate is ...
70-80 beats per minute
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Pacemaker of the heart, initiating the heart beat, located in the right atrium
Sinoatrial Node (SA)
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Delays the impulse of the SA before moving onto the ventricles. Passes the impulse to the ventricles for contraction via the left and right bundle of the Purkinje fibers
AV or atrioventricular node
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smaller chambers located superiorly on either side of the heart; gather blood coming to the heart
atria
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Gathers deoxygenated blood returning to the heart from the entire body
Right atrium
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Gathers reoxygenated blood coming to the heart from the lungs
Left atria
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Larger chambers of the heart located inferiorly on either side of the heart; main pumps of the heart, pumping blood to the rest of the body
Ventricles
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Receives deoxygenated blood from the right atrium and then pumps it to the lungs to be saturated with oxygen
Right ventricle
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Receives reoxygenated blood from the left atrium and proceeds to pump it to the entire body
Left ventricle
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The amount of blood that is pumped out with each contraction of a ventricle
Approx. 70-80 mL/beat
Stroke Volume (SV)
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The combination of how many times a heart beats per minute and how much blood is being pumped out with each beat
Cardiac output (Q)
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The vital support mechanism which provides an internal transportation, regulation, and protection system for the kinetic chain
Blood
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