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4.1 Key Terms (Tissues (An integrated group of cells with a common…
4.1 Key Terms
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Pulmonary Circulation
The passage of venous blood from the right atrium of the heart through the right ventricle and pulmonary arteries to the lungs where it is oxygenated and its return via the pulmonary veins to enter the left atrium and participate in systemic circulation.
Cardiovascular System
The transport system of the body responsible for carrying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes; composed of the heart, blood vessels, and blood.
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Aorta
The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.
Valves
A body structure that temporarily closes a passage or orifice, or permits movement of fluid in only one direction.
Inferior Vena Cava
A vein that is the largest vein in the human body and returns blood to the right atrium of the heart from bodily parts below the diaphragm.
Superior Vena Cava
A vein that is the second largest vein in the human body and returns blood to the right atrium of the heart from the upper half of the body.
Tricuspid Valve
A valve that is situated at the opening of the right atrium of the heart into the right ventricle and that resembles the mitral valve in structure but consists of three triangular membranous flaps.
Mitral (Bicuspid) Valve
A valve in the heart that guards the opening between the left atrium and the left ventricle; prevents the blood in the ventricle from returning to the atrium. Alternative name is bicuspid valve.
Pulmonary Valve
A semilunar valve between the pulmonary artery and the right ventricle of the heart that prevents the blood from flowing back into the right ventricle
Aortic Valve
The semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle.
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Artery
Any of the tubular branching muscular and elastic-walled vessels that carry blood from the heart through the body.
Atrium
An anatomical cavity or passage; especially a chamber of the heart that receives blood from the veins and forces it into a ventricle or ventricles
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