Term
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Definition
| the chambers that recieve blood into the heart |
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Term
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Definition
| chamber that pumps blood out of the heart |
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Term
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Definition
| carry the blood away from the heart to the organs throughout the body |
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Term
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Definition
| small vessels that branch off the arteries, conveying blood to the capillaries |
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Term
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Definition
| vessels that connect the capillaries to the veins |
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Term
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Definition
| return blood to the heart |
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Definition
| carries blood in the capillary beds in the digestive system to those of the liver |
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Term
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Definition
| conducts blood to the heart |
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Term
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Definition
| one atrium, one ventricle: two chambers |
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Term
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Definition
| picks up oxygen and disposes of carbon dioxide across capillary walls from blood from the ventricle |
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Term
| Systemic Circulation (Fish) |
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Definition
| gill capillaries converge into a vessel that carries oxygen-rich blood to capillary beds throughout all other parts of the body |
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Term
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Definition
| two atria, one ventricle: three chambers |
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Term
| Pulmocutaneous Circuit (Amphibians) |
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Definition
| leads to capillaries in the gas exchange organs where the blood picks up oxygen and releases carbon dioxide before returning to the heart's left atrium |
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Term
| Systemic Circuit (Amphibians) |
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Definition
| supplies oxygen-rich blood to all organs and returns oxygen-poor blood to the right atria via veins |
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Term
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Definition
| increases blood flow to brain because the blood is pumped again after having lost pressure in the capillaries of the gas exchange organs; in amphibians, reptiles, birds, and mammals |
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Term
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Definition
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Term
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Definition
| supplies blood to the heart itself |
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Term
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Definition
| conveys blood to arteries leading throughout the body |
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Term
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Definition
| a vein that conveys blood from the head, neck, and forelimbs to the right atrium |
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Term
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Definition
| a vein that conveys blood from the trunk and hind limbs to the right atrium |
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Term
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Definition
| one complete cycle of pumping and filling of the heart |
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Term
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Definition
| the contraction phase of the heart |
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Term
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Definition
| the relaxation phase of the heart |
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Term
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Definition
| the volume of blood per minute that the left ventricle pumps into the systemic circuit |
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Term
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Definition
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Term
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Definition
| the amount of blood pumped by the left ventricle in each contraction |
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Term
| Average Stroke Volume for Humans |
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Definition
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Term
| Atrioventricular (AV) Valve |
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Definition
| valve between each atrium and ventricle anchored by strong fibers that prevent them from turning inside out, close with contraction of ventricle preventing backflow |
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Term
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Definition
| valves where the aorta leaves the left ventricle and the pulmonary artery leaves the right ventricle, close as ventricles relax to prevent backflow |
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Term
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Definition
| a defect caused by defective valve(s), may be genetic or caused by infection damage |
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Term
| Sinoatrial (SA) Node/Pacemaker |
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Definition
| located in the wall of the right atrium, a region of the heart composed of specialized muscle tissue that regulates cardiac muscle cell contraction |
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Term
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Definition
| system in which the SA node is located in the heart itself |
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Term
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Definition
| system in which SA node originate in motor nerves arising from the outside |
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Term
| Atrioventricular (AV) Node |
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Definition
| located in the wall between the right atrium and ventricle, a relay point of impulses passed from the SA node |
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Term
| Bundle Branches & Purkinje Fibers |
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Definition
| conduct signals to the apex of the heart and throughout the ventricular walls |
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Term
| Electrocardiogram (ECG, EKG) |
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Definition
| electrical currents from heart conducted through body fluids to skin detected by electrodes and recorded |
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