An atrium is a chamber in a vertebrate heart that receives blood from veins and directs it to a ventricle.
An atrium is a chamber in a vertebrate heart that takes in blood from veins and passes it to a ventricle.
| Front | atrium |
|---|---|
| Back | A chamber of the vertebrate heart that receives blood from the veins and transfers blood to a ventricle. |
Tags: ch.42
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