1. Anchors valve cusps 2. Prevents overdilation of valve openings 3. Main point of insertion for cardiac muscles 4. Blocks direct spread of electrical impulse
Wrong
The "lub" sound is the _ and _ valves closing
Tricuspid and bicuspid
Wrong
The "dup" sound is the _ and _ valves closing
Pulmonary and aortic
Wrong
Systole is the _ of the heart chamber
Contraction
Wrong
Diastole is the _ of the heart chamber
Expansion
Wrong
Which circuit is longer and offers greater resistance to blood flow?
Systemic
Wrong
The _ ventricle is 3 times thicker than the _ ventricle
Left, right
Wrong
The coronary arteries supply blood to the:
Muscular walls of the heart
Wrong
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