Answer: 6 days
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Answer:
Abdominal Strength and Endurance
Explanation:
Curl ups target the rectus abdominis, transverse abdominis, and obliques (aka abdoominals).
Answer:
Sam feels that he should be able to stay out longer while his parent's don't think so.
Explanation:
A. Pacemaker cells located in the atria fire before the pacemaker cells in the ventricles. B. It takes time for hormones to diffuse from the atria to the ventricles to trigger contraction. C.The electrical signal generated in the right atrium is delayed at the AV node before passing to the ventricles. D.The ventricular muscle cells contract more slowly than the atrial muscle cells.
