Question : In which vertebrate oxygenated and deoxygenated blood gets mixed?
Option 1: Fish
Option 2: Amphibian
Option 3: Bird
Option 4: Mammal
Correct Answer: Amphibian
Solution : The correct option is Amphibian.
The mixing of oxygenated (oxygen-rich) and deoxygenated (oxygen-poor) blood happens in a cardiac region known as the ventricle in
reptiles and some amphibians
. Because they have a
three-chambered heart
with a partly split ventricle. Because of this anatomical configuration, some oxygenated and deoxygenated blood may be mixed before being pumped to different areas of the body. However, this mixing is not as widespread as in animals with entirely non-divided (
two-chambered
) hearts, such as
fish
. In their
four-chambered hearts
,
mammals and birds
have evolved a full separation of oxygenated and deoxygenated blood, allowing for more effective oxygen delivery to tissues and organs.
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