Which of the following is true of vertebrates with four-chambered hearts? there is a partial gas exchange in one chamber of the heart. there is a partial mixing of oxygen-rich and oxygen-poor blood. there is no mixing of oxygen-rich and oxygen-poor blood. there is a complete mixing of oxygen-rich and oxygen-poor blood.

There is no mixing of oxygen-rich and oxygen-poor blood.

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The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.

slitherio is the original. its the best friend of all middle schoolers. the man you can count any time you have some free time. slitherio is the guy you hang with while you're in the computer lab suppose to be doing "research or whatever". slitherio isn't just a game but a friend.

wormaxio is just a fake trying to squeeze its way into the friend group. trying to pretend its cool and your best pal but how long has it really been there for you, really. it only wants you as friend to boost its social status. wormaxio is just annoying fake pleb. no offense

you and have a wonderful day