Wednesday
April 16, 2014

Homework Help: health

Posted by Sandy on Wednesday, March 25, 2009 at 11:13pm.

The function of the sinoatrial node is to
A. keep the heart beating.
B. filter lymph.
C. prevent blood from backing up into the atrium.
D. divide the right and left sides of the heart.

The sinoatrial node is also known as the pacemaker
of the heart because it sets the pace of the heart rate.

the answers confuse me. i think b not sure

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