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Sinus venosus is fused with in the mamm...

Sinus venosus is fused with ______ in the mammalian heart.

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To answer the question "Sinus venosus is fused with ______ in the mammalian heart," we can follow these steps: ### Step 1: Understand the Structure of the Heart The mammalian heart consists of several chambers, including the right atrium, right ventricle, left atrium, and left ventricle. It also has various structures that play a role in the circulation of blood. ### Step 2: Define Sinus Venosus The sinus venosus is a large quadrangular cavity that is located on the venous side of the heart. In mammals, it is primarily found during embryonic development. ...
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