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The Cardiovascular System

Across
Rapid but regular contractions usually of atria
Inner lining of the heart
Blood vessels that branch from the aorta and carry oxygen rich blood to the heart
Smallest blood vessel; materials pass to and from the bloodstream through its thin walls
Blue
Flow of blood from the heart to the lungs and back to the heart
Lower tip of the heart
Largest vein in the body; returns blood directly to the heart
Heart
Partition or wall dividing a cavity; such as between the right and left atria
Brief discharges of electricity applied to stop dysrhythmias
Pulse
The two lower chambers of the heart
Down
Record of electricity flowing through the heart
Local dilation of an arterial wall
Muscular middle layer of the heart
Vessel
Valve between the left atrium and left ventricle, bicuspid valve
Small artery
Yellowish plaque, fatty substance
The two upper chambers of the heart
Contraction phase of the heartbeat
Small hole in the septa between the atria or ventricles
Double layered membrane surrounding the heart
Chest
Relaxation phase of the heartbeat
Arm
Abnormal swishing sound caused by improper closure of the heart valves
Small vein
Beat of the heart as felt through the walls of the arteries