Birds have a four-chambered heart, additional digestive chambers (crop and gizzard), and are warm-blooded (homoiothermous).
Birds have a four-chambered heart, additional digestive chambers (crop and gizzard), and are warm-blooded (homoiothermous).
| Text | The digestive tract of birds has additional chambers, the crop and gizzard. Heart is completely fourchambered. They are warm-blooded (homoiothermous) animals |
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