The answer is that some animals have belly buttons, but not all of them! Animals who are mammals all have belly buttons, because these animals are all born from the mother. (Rather than animals like reptiles, who hatch from eggs.) Mammals have belly buttons because the navel is the spot on the body where a special tube used to connect the mother and baby, which was how the baby received food and oxygen before it was born. In some mammals, like humans, the belly button is really easy to see while in others, like cats and dogs, the scar heals more completely and then gets covered by lots of fur!
Some other animals can also have "belly buttons" that are similar to those of mammals. While it’s not quite the same as a mammal’s umbilical cord, some animals like certain birds and reptiles have a tube that connects them to the nutrients in the egg from which they hatch. Similar to mammals, this tube leaves behind a navel-like scar after birth!
The belly buttons of most animals are much harder to see than our own. Have you ever seen a belly button on an animal? If so, what did it look like??
If you didn’t know what your belly button was for, what are some other ideas about it that you could think up?
Sources & links
Onken, Michael. “Re: Do animals have navels?” 1 Sep. 2000. MadSci Network. 24 Oct. 2010 “Animals and bellybuttons.” Bellybutton Facts ”“ Bellybutton Lint. Australian Broadcasting Corporation: Science. 24 Oct. 2010 "Scarlett, do animals have bellybuttons? - question and answer". Ranger Rick. FindArticles.com. 24 Oct, 2010.