Unit 9 Cardiovascular System

The region of the heart between the right atrium and ventricle from which electrical impulses spread to the ventricles during a heartbeat.

• AV Node

• SA Node

• cardiac center

• pericardial cavity

The pacemaker of the heart.

• AV Node

• SA Node

• cardiac center

• pericardial center

part of the medulla oblongata that controls heart rate

• cardiac center
• pericardial cavity
• SA node
• AV node

relaxation of the heart

• diastole
• systole
• T-wave
• P-wave

Tags

NGSS.HS-LS1-3

contraction of the heart

• diastole
• systole
• T-wave
• P-wave

Chose the picture that shows a(n): P-Wave

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Chose the picture that shows a(n): QRS-Complex

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Coronary arteries are...

• the two vessels that supply blood to the heart muscle
• fine, branching blood vessels that allow exchange of materials between blood and heart tissues
• the blood vessels that supply blood to the lungs
• the two vessels that leave the heart and enter the lungs

The fluid filled body cavity that contains the heart,

• cardiac center
• pericardial cavity
• Abdominal center
• Pleural cavity

Also known as the "heart strings", hold the valves in place and prevent backflow.

• chordae tendinae
• papillary ligiments
• ciliary muscles
• precapillary sphincters