What structure evolved into the sinoatrial node?
A)the SV node
B)connective tissue around the heart
C)the sinoatrial node evolved de novo
D)the sinus venosus
E)the bulbus arteriosus

Name: What structure evolved into the sinoatrial node? A)the SV node B)connective tissue around the heart C)the sinoatrial node evolved de novo D)the sinus venosus E)the bulbus arteriosus
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Question

Quizplus · Accepted Answer

The sinoatrial node evolved from the sinus venosus, a chamber in the early vertebrate heart that received blood returning from the body.

What Structure Evolved into the Sinoatrial Node