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.
You can let an adult know?
Answer: carbon monoxide,hydrogen cyanide
Explanation:
Pill
Iud
Implant
Pull out method
Ring
Answer:
I just want to be able to make it tomorrow
