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Cardiovascular System Part 2

Anatomy and Physiology25 CardsCreated 4 months ago

This deck covers key concepts and facts about the cardiovascular system, focusing on the heart's anatomy, functions, and common conditions.

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What is the right AV node called?

Tricuspid Valve
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Key Terms

Term
Definition
What is the right AV node called?
Tricuspid Valve
How many flaps does the tricuspid valve have?
3
Semilunar valves
Set of valves that guards the bases of the 2 large arteries leaving the ventricular chambers
How many leaflets do the semilunar valves have?
3
Left Aortic
three half-moon shaped cusps (flaps)
Right Pulmonic
three half-moon shaped cusps (flaps)
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Cardiovascular System Part 2
TermDefinition
What is the right AV node called?
Tricuspid Valve
How many flaps does the tricuspid valve have?
3
Semilunar valves
Set of valves that guards the bases of the 2 large arteries leaving the ventricular chambers
How many leaflets do the semilunar valves have?
3
Left Aortic
three half-moon shaped cusps (flaps)
Right Pulmonic
three half-moon shaped cusps (flaps)
When do the AV valves open?
During heart relaxation
When are the semilunar valves closed?
During heart relaxation
Valvular Stenosis
When the valve flaps become stiff
Endocarditis
Bacterial infection of endocardium (Enlarges Heart)
Coronary Arteries
Branch from the base of the aorta and encircle the heart
Angina Pectoris
When the myocardium is deprived of oxygen and results in a crushing chest pain.
Myocardial Infarction
Heart Attack, heart cells die because of prolonged oxygen deprivation
Why are the walls of the atria thicker?
They carry high pressure
How much blood does the heart pump in one day?
It pushes the body's supply of 6 quarts of blood (6 liters) through the blood vessels over 1000 times, meaning it actually pumps about 6000 quarts of blood in a single day.
What are the 2 systems that act to regulate the heart activity?
1. Autonomic Nervous System, 2. Intrinsic Factor
Intrinsic Conduction System
Sets the basic rhythm
On average, how many times does the heart beat per minute?
75
Where is the SA node located?
Right Atrium
Where is the AV node located?
At the junction of the atria and the ventricles
Sinoatrial (SA) Node is also known as...
the pacemaker of the heart
Purkinje Fibers
Spread within the muscle of the ventricle walls
Describe how the Intrinsic Conduction System Works
1st the SA node (a tiny cell mass) starts each heartbeat and sets the pace. 2nd From the SA node, the impulses spreads through the atria to the AV node to cause a contraction, 3rd Once the AV node is finished contracting it is passed through the AV bundle, the bundle of His, the bundle branches and the Purkinje fibers.
Heart Block
When the SA and AV nodes are not communicating and when there is damage to the SA node
What is the result when damage is done to the SA node?
Slower heart rate