Normal Structure & Function Flashcards
The largest artery; it receives blood from the left ventricle and branches to all parts of the body
AORTA (root: aort/o)
The valve at the entrance to the aorta
Aortic valve
The point of a cone-shaped structure; the apex of the heart is formed by the left ventricle and is pointed toward the inferior and left
Apex (adjective: apical)
A vessel that carries blood away from the heart; all except the pulmonary and umbilical arteries carry oxygenated blood
Artery (roots: arter, arteri/o)
A small vessel that carries blood from the arteries into the capillaries
Arteriole (root: arteriol/o)
A small mass in the lower septum of the right atrium that passes impulses from the sinoatrial
(SA) node toward the ventricles
atrioventricular (AV) node
A valve between the atrium and ventricle on the right and left sides of the heart; the right AV valve is the tricuspid valve; the left is the mitral valve
atrioventricular (AV) valve
An entrance chamber, one of the two upper receiving chambers of the heart
atrium (root: atri/o)
A band of fibers that transmits impulses from the atrioventricular (AV) node to the top of the interventricular septum; it divides into the right and left bundle branches, which descend along the two sides of the septum; the bundle of His
AV bundle
The force exerted by blood against the wall of a vessel
blood pressure
Branches of the AV bundle that divide to the right and left sides of the interventricular septum
bundle branches
A microscopic blood vessel through which materials are exchanged between the blood and the tissues
capillary
The part of the circulatory system that consists of the heart and the blood vessels
cardiovascular system
The blood vessels in the heart that provide oxygen and nourishment and remove waste products from the myocardium
coronary circulation
A change in electrical charge from the resting state in nerves or muscles
depolarization
The relaxation phase of the heartbeat cycle
diastole (adjective: diastolic)
Study of the electrical activity of the heart as detected by electrodes (leads) placed on the surface of the body; also abbreviated EKG from the German electrocardiography
electrocardiography (ECG)
The thin membrane that lines the chambers of the heart and covers the valves
endocardium
The thin outermost layer of the heart wall
epicardium