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Tiara1200 Tiara1200
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10 years ago Edited: 10 years ago, Tiara1200
Since the SA node is at the top of the atrial mass, the atria contract from the top down. How does this increase the efficiency of atrial contraction? Do the ventricles have a similar arrangement? If so, how does it work?
Post Merge: 10 years ago

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Educator
10 years ago
Hi Tiara1200,

See if this topic helps: https://biology-forums.com/index.php?topic=80158.0
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