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Venacavae in man, open into :
1. all parts of body
2. left auricle
3. right ventricle
4. left ventricle
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In man, superior venacava collects blood from :
1. right auricle
2. head, legs
3. hands, legs
4. head, neck
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Incompletely divided ventricle occurs in :
1. fish
2. frog
3. reptiles
4. birds
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A four chambered heart occurs in :
1. fishes, birds
2. amphibians, reptiles
3. reptiles, mammals
4. birds, mammals
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