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cardiovascular

cardiovascularsystem

TermDefinition
heart located within the central part of the chest (mediastinum) and functions as a pump to move blood throughout the body.
Artery/Arteriole Thick-walled vessels that carry blood away from the heart. They propel blood with each contraction of the heart and are associated with various pulse points on the body. Smaller branches are arterioles.
Vein/Vessel Vessels that carry blood toward the heart. They are thinner-walled than arteries and contain valves to prevent backflow. Smaller branches are venules.
Capillary the smallest blood vessels which connect arterioles to venules. They aid in the exchange of oxygen and nutrients between blood and body cells.
Endocardium Innermost layer of cells that lines the atria, ventricles, and heart valves.
Myocardium muscular layer of the heart
pericardium outermost layer of the heart. a membrane that surrounds the heart and secrets pericardial fluid.
cardiovascular system works to pump blood throughout the body. blood carries essential oxygen and nutrients to cells and aids in eliminating waste.
Average adult heart beat 60 to 80 times per minute while at rest
right atrium receives deoxygenated blood from the superior and inferior vena cava. top chamber of the heart
left atrium receives deoxygenated blood from the pulmonary veins ( the on ly veins in the body that carry oxygenated blood). top chamber of the heart.
right ventricles bottom chamber of the heart. receives blood from right atrium and sends deoxygenated blood through pulmonary valve to the pulmonary artery then to the lungs where gas exchange occurs.
left ventricle bottom chamber of the heart. receives blood from the left atrium and sends deoxygenated blood through the aortic valve to the aorta, which then branches off into smaller arteries that carry blood to the body.
tricuspid valve between right atrium and right ventricles. prevents backflow of the blood into the atria when ventricles contract
bicuspid (mitral) valve between left atrium and left ventricle. prevents backflow of the blood into the atria when ventricles contract.
systemic circulation consists of arteries, arterioles, capillaries, venules, and veins in the body as a whole.
pulmonary circulation consists of arteries, arterioles, capillaries, venules, veins going to, within, and coming from the lungs.
sinoatrial node (SA) also called the pacemaker of the heart
atrioventricular nodes also called the gatekeeper
Purkinje fibers cause the ventricles to contract and pump blood into the pulmonary artery and the aorta.
cardiac cycle electrical impulse generated by the SA node, travels to the gatekeeper, then to the bundle of His and through the bundle branches located in the ventricular septum. Finally the impulse reaches the purkinje fibers.
Created by: elshalance
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