The Cardiovascular System
Terms and definitions of the cardiovascular system.
a data set by ms_thompson
created April 6, 2017
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|Cardiovascular system||Responsible for the circulation of nutrients, oxygen, carbon dioxide, hormones and blood cells to and from the cells in the body.|
|Heart||Key organ of the circulatory system with four chambers; propels blood throughout the body depending on needs|
|Right and left atria||The two upper chambers of the heart; recieve blood entering the heart|
|Interatrial septum||The wall of tissue that separates the right atrium from the left atrium|
|Atrioventricular valves (AV valves)||Separate the atria from the ventricles and allow blood to flow from the atria to the ventricles, but prevent flow in the opposite direction|
|Arteries||Blood vessels carrying blood away from the heart|
|Coronary arteries||Branch off at the beginning of the aorta and divide into a network of smaller arteries that provide oxygen and nourishment to the muscles of the heart|
|Pulmonary artery||Carries oxygen-poor blood from the right ventricle of the heart to the lungs to pick up oxygen|
|Endothelium||Inner-most lining of the artery; provides a smooth lining for blood to flow over as it moves through|
|Media||Middle part of the artery, made up of a layer of muscle and elastic tissue.|
|Adventitia||Tough covering that protects the outside of the artery|
|Arterioles||Smaller, less flexible branch of the arteries that are found as arteries get further from the heart; lead to capillaries|
|Veins||Blood vessels that carry blood back to the heart|
|Vena cava||A large vein carrying deoxygenated blood into the heart; superior or inferior|
|Capillaries||Small branching blood vessels that deliver nutrients and oxygen to the cells|
|Cardiac cycle||One complete heartbeat; the rhythmic contraction and relaxation of the chambers of the heart|
|Systole||The contraction of the heart muscles that sends blood into circulation|
|Diastole||The relaxation of the heart muscles, allowing the chambers to be filled with blood|
|Aorta||The main artery of the body that supplyies oxygenated blood to the circulatory system|
|Pulmonary circulation||Part of the circulatory system that carries deoxygenated blood from the heart to the lungs, and returns oxygen-rich blood back to the heart|
|Systemic circulation||Part of the cardiovascular system which carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart.|
|SA node||The sinotrial node; a small area of tissue in the wall of the right atrium that sends out an electrical signal to start contracting the heart muscle|
|AV node||Controls the heart rate; an electrical relay station that slows the electrical current sent by the SA node before being passed to the ventricles.|
|Plaque||The accumulation of fat in blood vessels|
|Occlusion||Blood vessels, arteries or veins which have become totally blocked to any blood flow|
|Capillary bed||The system of capillaries of a body part or organ|
|Hypertension||Abnormally high blood pressure|
|Cholesterol||A waxy substance that is found in the body's cells, blood, and in some foods|
|Blood||A fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart, carrying oxygen and nutrients to and waste materials away from all body tissues|
|Blood vessels||A tubular structure carrying blood through the tissues and organs; a vein, artery, or capillary.|
|Heart murmur||Sounds such as whooshing or swishing during the heartbeat cycle made by turbulent blood in or near your heart|