Get an AnswerBIO 350 R 1 Week – Cell Structure and Function: Cell Types andSmart Writing ServicesOctober 25, 2017 8:33 amOctober 25, 2017Previous ArticleSince the SA node is at the top of the artial mass, the atria contract from the top downNext ArticleHow is DNA replicated, and how is stored genetic information used to produce an active protein in the cell?