Digestive Tract Birds Additional Chambers Crop Gizzard Heart

Birds possess a crop and gizzard in their digestive tract, have a four-chambered heart, and are warm-blooded (homoiothermous).

Birds' digestive tracts include a crop and gizzard, they have a four-chambered heart, 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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