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Chapter 6: Cardiovascular System
1.
The fibrous membrane that encloses the heart
2.
Exits the left atrium into the left ventricle
3.
Tiny veins
4.
The area slightly left of the center of the chest
5.
Blood returns from the body to the right atrium through these inferior and superior structures
6.
The contraction and relaxation of the four heart chambers
7.
A lubricant that reduces friction while the heart contracts and relaxes
8.
Blood enters these after leaving the arterioles; their walls are just one cell thick
9.
The natural pacemaker for the heart
10.
The middle, muscular layer of the heart
11.
A fatty, plaque-like substance that can narrow or block coronary vessels
12.
The two lower chambers of the heart
13.
Structures that transport oxygen-rich blood to various parts of the body
14.
Tiny arteries
15.
The term that means “listening to”
16.
The valve that exits the left ventricle into the aorta
17.
The outer lining of the heart
18.
Locations on the body with a strong pulse that are easily palpated
19.
The tip of the heart
20.
The thick layer of muscle tissue that divides the left and right sides of the heart
21.
The second pacemaker that transmits the SA node impulse to both ventricles
22.
The lower blood pressure number that reflects the lowest pressure exerted against artery walls during ventricular relaxation
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