Heart & Vessel Anatomy
Heart & Vessel Anatomy 2
Intrinsic Conduction System
Cardiac Cycle
Blood Pressure
100
This is the vessel that carries blood towards the heart
What is a vein?
100
These are the receiving chambers of the heart
What are the atria?
100
This component of the intrinsic conduction system is said to be the "pacemaker" of the heart
What is the sinoatrial (SA) node?
100
During this phase of the cardiac cycle, the ventricles are relaxed
What is diastole?
100
This is your blood pressure at the highest point of ventricle contraction
What is the systolic pressure?
200
This is the name for a very small artery
What is an arteriole?
200
This is the hollow space inside a blood vessel
What is the lumen?
200
The traveling impulse pauses at this node to allow time for the atria to contract
What is the atrioventricular (AV) node?
200
During this phase of the cardiac cycle, the ventricles are contracted
What is systole?
200
This is your blood pressure during ventricle relaxation
What is diastolic pressure?
300
This is the only vessel layer that capillaries possess
What is the tunica intima (interna)?
300
This is the muscular layer that surrounds the ventricles
What is the myocardium?
300
This component of the intrinsic conduction system is where the traveling impulse comes to an end
What are the Purkinje fibers?
300
During this phase of the cardiac cycle, the atria are relaxed and filling with blood
What is systole?
300
This is the term for low blood pressure
What is hypotension?
400
Blood travels through this valve on its way to the lungs
What is the pulmonary semilunar valve?
400
During ventricular relaxation, these valves are closed
What are the semilunar valves?
400
When this occurs, the internal environment of a cell goes from negative to positive in response to ions traveling across the membrane
What is depolarization?
400
When pressure in the ventricles is high, these valves close
What are the atrioventricular (bicuspid and tricuspid) valves?
400
This is the mechanism your nervous system stimulates to bring your blood pressure back up when it gets too low
What is vasoconstriction?
500
This is the chamber that discharges blood to the rest of the body
What is the left ventricle?
500
The heart itself is nourished by these vessels
What are the coronary arteries?
500
In an EKG tracing, this component represents the depolarization of the atria, and thus their contraction
What is the P wave?
500
Towards the end of this cardiac cycle, the atria contract to force their remaining blood into the ventricles
What is diastole?
500
Blood pressure is a product of cardiac output and this
What is peripheral resistance?
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