medical terms Flashcards
relating to the heart and blood vessels
Cardiovascular
Any of tubular passageways in cardiovascular system through which blood travels
Blood vessel
the main blood vessel that supplies oxygen-rich blood to the heart.
coronary artery
Either of the two upper chambers of heart
Atrium
Either of the two lower chambers of heart
Ventricle
Structure that prevent fluid from flowing backward or forward
Valve
A tiny artery connecting to a capillary
Arteriole
A thick-walled blood vessel (carries oxygenated blood away from heart).
Artery
Relaxation phase of a heartbeat (the heart is relaxed)
Diastole
Contraction phase of the heartbeat (the heart is contracted)
Systole
Membranous lining of chambers and valves of heart; the innermost layer of heart tissue.
Endocardium
Lining of the arteries that secretes substances into the blood.
Endothelium
Outermost layer of heart tissue
Epicardium
Muscular layer of heart tissue between epicardium and endocardium.
Myocardium
Protective covering of heart
Pericardium
Rhythmic expansion and contraction of a blood vessel
Pulse
Region of right atrium containing specialized tissue that sends electrical
impulses and excite heart for contraction
Sinoatrial (SA) node