Why Do We Have Belly Buttons?

The video explains that belly buttons, or navels, are scars from the umbilical cord, which connects a baby to its mother for nutrients and oxygen before birth. After birth, the cord is cut, leaving a belly button. This process is similar in many mammals, but not in egg-laying animals like birds and reptiles, which don't have belly buttons as they aren't connected to their mothers by a cord.

What is a belly button scientifically known as?

• Button

• Cord

• Scar

• Navel

What is the primary function of the umbilical cord?

• To help the baby move inside the womb

• To protect the baby from infections

• To provide oxygen and nutrients to the baby

• To help the baby breathe air

What happens to the umbilical cord after a baby is born?

• It is absorbed by the body

• It remains attached to the baby

• It turns into a scar immediately

• It is cut and eventually falls off

Which animals are mentioned as having belly buttons similar to humans?

• Fish and amphibians

• Dogs and cats

• Chimpanzees and gorillas

• Birds and reptiles

Why don't egg-laying animals have belly buttons?

• They are not connected to their mothers by a cord

• They have a different type of scar

• They don't need oxygen

• They develop outside the mother's body