What are the intercostal muscles?
A. An abnormal tightening or shortening of muscles
B. Supplemental muscles that provide support or aid to essential organs, tissues, or structures
C. The tendon that runs along the back of the thigh, from the hip to the knee
D. The muscles between the ribs that contract during respiration
D
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The atrium opens into the ventricle through the:
A) atrioventricular valve. B) coronary sinus. C) chordae tendinae. D) All of the above
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The percentage of blood pushed and squeezed out of the heart is called the ____.
A. injection fraction B. divergence rate C. ejection fraction D. pressure rate
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