Short Answer
The heartbeat is initiated by the cardiac muscle fibers of the _______________ node.
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q74: Development of the heart commences in the
Q75: The relatively small size of the Purkinje
Q76: The papillary muscles attach to the cusps
Q77: The great cardiac vein runs alongside the<br>A)anterior
Q78: Which heart chambers pump deoxygenated blood?<br>A)Left atrium
Q80: Which correctly describes the heart's apex?<br>A)Projects slightly
Q81: Which bears a close structural relationship with
Q82: The left and right coronary arteries travel
Q83: No matter the cause,hypertrophy of the heart
Q84: Which action causes the closure of the