(THE CONVERSATION) – Everyone has one, but you might not know much about it. Here biologist Sarah Leupen, who teaches human and comparative animal physiology, explains the ins and outs of belly ...
Everyone has a belly button. It’s the small fold of skin that formed in your abdomen after the umbilical cord was clipped at birth. Belly buttons can be concave (innies) or convex (outies). ‌ Most of ...
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