Biology PLTW Lesson 4.1, 4.2 Key Terms
Terms in this set (29)
The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.
The semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle.
Any of the tubular branching muscular and elastic-walled vessels that carry blood from the heart through the body.
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.
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.
The smallest structural unit of living matter capable of functioning independently.
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.
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.
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.
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.
The branch of the circulatory system that supplies all body organs and then returns oxygen-poor blood to the right atrium via the veins.
An integrated group of cells with a common function, structure, or both.
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.
A body structure that temporarily closes a passage or orifice, or permits movement of fluid in only one direction.
A vessel that returns blood to the heart.
A specialized mass of conducting cells located at the atrioventricular junction in the heart.
Pressure exerted by the blood upon the walls of the blood vessels, especially arteries, usually measured by means of a sphygmomanometer and expressed in millimeters of mercury.
The study of the heart and its action and diseases.
The stage of the heart cycle in which the heart muscle is relaxed, allowing the chambers to fill with blood.
Blood pressure that remains between heart contractions.
A measurement of heart electrical activity.
A measure of cardiac activity usually expressed as the number of beats per minute.
An abnormally high blood pressure.
An electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart.
The rhythmic expansion and recoil of arteries resulting from heart contraction; can be felt from the outside of the body.
A small mass of tissue that is made up of Purkinje fibers, ganglion cells, and nerve fibers, that is embedded in the musculature of the right atrium, and that originates the impulses stimulating the heartbeat -- called also S-A node, sinus node.
An instrument for measuring blood pressure and especially arterial blood pressure.
The stage of the heart cycle in which the heart muscle contracts and the chambers pump blood.
The pressure generated by the left ventricle during systole.
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