The Cardiovascular System

Terms and definitions of the cardiovascular system.
a data set by ms_thompson
created April 6, 2017
Cardiovascular systemResponsible for the circulation of nutrients, oxygen, carbon dioxide, hormones and blood cells to and from the cells in the body.
HeartKey organ of the circulatory system with four chambers; propels blood throughout the body depending on needs
Right and left atriaThe two upper chambers of the heart; recieve blood entering the heart
Interatrial septumThe 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
ArteriesBlood 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 arteryCarries oxygen-poor blood from the right ventricle of the heart to the lungs to pick up oxygen
EndotheliumInner-most lining of the artery; provides a smooth lining for blood to flow over as it moves through
MediaMiddle part of the artery, made up of a layer of muscle and elastic tissue.
AdventitiaTough covering that protects the outside of the artery
ArteriolesSmaller, less flexible branch of the arteries that are found as arteries get further from the heart; lead to capillaries
VeinsBlood vessels that carry blood back to the heart
Vena cavaA large vein carrying deoxygenated blood into the heart; superior or inferior
CapillariesSmall branching blood vessels that deliver nutrients and oxygen to the cells
Cardiac cycleOne complete heartbeat; the rhythmic contraction and relaxation of the chambers of the heart
SystoleThe contraction of the heart muscles that sends blood into circulation
DiastoleThe relaxation of the heart muscles, allowing the chambers to be filled with blood
AortaThe main artery of the body that supplyies oxygenated blood to the circulatory system
Pulmonary circulationPart of the circulatory system that carries deoxygenated blood from the heart to the lungs, and returns oxygen-rich blood back to the heart
Systemic circulationPart of the cardiovascular system which carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart.
SA nodeThe 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 nodeControls the heart rate; an electrical relay station that slows the electrical current sent by the SA node before being passed to the ventricles.
PlaqueThe accumulation of fat in blood vessels
OcclusionBlood vessels, arteries or veins which have become totally blocked to any blood flow
Capillary bedThe system of capillaries of a body part or organ
HypertensionAbnormally high blood pressure
CholesterolA waxy substance that is found in the body's cells, blood, and in some foods
BloodA 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 vesselsA tubular structure carrying blood through the tissues and organs; a vein, artery, or capillary.
Heart murmurSounds such as whooshing or swishing during the heartbeat cycle made by turbulent blood in or near your heart
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