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Human Circulatory System

This topic serves as a review for the circulatory system along with disorders.

Transportnvolves the absorption and circulation of materials throughout an organism
ArteriesThick-walled, carry blood away from the heart
VeinsThin-walled, carry blood toward the heart
ArteriesCarries oxygenated blood (high levels of oxygen)
ArteriolesArteries divide into smaller vessels known as
VeinsCarries deoxygenated blood
VeinsContain valves which help prevent the backflow of blood
VenulesVeins divide into smaller vessels known as
CapillariesVery thin-walled (one cell thick)
CapillariesSite for the exchange of materials between the blood and body cells
CapillariesConnect arterioles and venules
HeartComposed of cardiac muscle
HeartIt is a 4-chambered pump composed of 2 atria and 2 ventricles
Superior Vena CavaBrings deoxygenated blood from the upper portion of the body and into the right atrium
Inferior Vena CavaBrings deoxygenated blood from the lower portion of the body and into the right atrium
Right AtriumReceives blood from the inferior and superior vena cava and pumps it into the right ventricle
A-V valveSeparates the atrium from the ventricle
Semi-lunar valveSeparates ventricles from the arteries
Right VentricleReceives blood from the right atrium and pumps it into the pulmonary artery
Pulmonary ArteryReceives blood from the right ventricle and transports it to the lungs
Pulmonary VeinReceives oxygenated blood from the lungs and transports it to the left atrium
Left AtriumReceives blood from the pulmonary vein and pumps it into the left ventricle
Left VentricleReceives blood from the left atrium and pumps it into the aorta
AortaReceives blood from the left ventricle and transports it to the rest of the body
SeptumSeparates the heart into a left side and a right side
Pulmonary CirculationThe pathway from which blood flows from the heart à to the lungs à and back to the heart
Systemic CirculationThe pathway that carries blood from the heart to all parts of the body with the exception of the lungs
Coronary CirculationMuscle tissue of the heart is supplied with blood through a system of coronary blood vessels
Coronary arteriesSupply oxygenated blood to the muscle tissue of the heart
DiastoleIs the period when the ventricles are filling with blood. The A-V valve is open and blood flows from the atrium to the ventricle
SystoleIs the period when the ventricle pumps blood out of the heart. A-V valve closes and the semi-lunar valve opens
SphygmomanometerInstrument used to measure the pressure of the blood in the artery of the arm
Cardiovascular DiseasesAre diseases of the heart and blood vessels
High Blood PressureIncreased pressure in the arteries due to stress, diet, cigarette smoking, and aging
Coronary ThrombosisBlockage of the coronary artery resulting in oxygen deficiency in the heart muscle
Angina PectorisNarrowing of the coronary artery causing an inadequate supply of oxygen to the heart muscle

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