Glass of milk   Standing in between extinction in the cold   and explosive radiating growth.   So the warm blood flows   Through the large four-chambered heart,   Maintaining the very high metabolism rate they have.   Mammal, mammal   Their names are called   They raise a paw   The bat, the cat   Dolphin and dog   Koala bear and hog   One of us might lose his hair   But you're reminded that it once was there   From the embryonic whale to the monkey with no tail.   So the warm blood flows   with the red blood cells, lacking nuclei   Through the large four-chambered heart   Maintaining the very high metabolism rate they have   Mammal, mammal   Their names are called   They raise a paw   The bat, the cat   Dolphin and dog   Koala bear and hog   Placental the sister of her brother Marsupial   Their cousin called Monotreme   Dead uncle Allotheria   Mammal, mammal   Their names are called   They raise a paw   The bat, the cat   Dolphin and dog   Koala bear and hog   The fox, the ox   Giraffe and shrew   Echidna, caribou