Under Pressure
Refers to one complete heartbeat
what is cardiac cycle
large vein(s) that carries blood into the right atria
what are superior (& inferior) vena cava
Muscular middle layer of the heart
what is Myocardium
Arteries branch off the aorta to nourish the heart with oxygenated blood during this type of circulation
what is cardiac circulation
average heart rate
what is around ~75 bpm
Blockage of the "widow maker" artery often causes a fatal ____________
what is a heart attack
These blood vessels have valves
what are veins
discharging chamber to the lungs
what is right ventricle
Arteries circulate blood _______ from the heart into systemic circulation
what is Away?
another word for bicuspid valve
What is mitral valve?
Heart's double walled sac
what is pericardium
middle layer of most blood vessels
what is tunica media
Discharging chamber to the aorta
what is left ventricle
Arteries that branch from the aorta to supply the heart muscle with oxygenated blood
WHat are Coronary Arteries
when arterial pressure is at its highest due to ventricles are contracting (top number)
What is Systolic blood pressure
Large vein on the back of the heart that returns blood to right atrium during cardiac circulation
what is the Coronary Sinus
The only time an artery will carry deoxygenated blood
what is the pulmonary artery
receiving chamber after the blood is oxygenated in the lungs
What is Left Atria
Arteries give rise to smaller, branching _____________
The Heart's natural pacemaker
What is the (SA) Sinoatrial Node
The technical name for "Heart Strings"
What are chordae tendinae?
primary blood vessels where exchange occurs
what are capillary beds
The "dub" in the heart's "lub dub", is the closing of what
What are semi-lunar valves
The cavity of an artery and vein
what is lumen
System that sets the basic rhythm of the heart
What the Intrinsic Conduction System