1 Sea mammal blowhole. Any rnanimal that spends rnappreciable time in the ocean should be able to extract oxygen from water via gills. Enlarging the lungs and moving a nostril to the back of the head is a poor work-around.rn2 Hyena clitoris. When engorged, this "pseudoponis," which doubles as the birth canal. becomes so hard it can crush babies to death during exit.rn3 Kangaroo teat. In order to nurse, the just-born joey, a frail and squishy jellybean, must clamber up Mom's torso and into her pouch for a nipple.
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