The baby's umbilical cord is cut immediately after birth.

He was surprised to find a belly button lint.

He was unconsciously fiddling with his navel lint while watching TV.

His baby developed omphalitis, and they had to take him to the hospital.

The baby's umbilical vein plays a crucial role in transporting nutrients from the mother.

He got angry over a trivial matter.

After failing, he blamed himself and was biting his own navel (figuratively expressing deep regret).

The porcupine is a nocturnal animal that protects itself with its sharp quills.

The babirusa is a rare animal native to Indonesia.

This farm is raising wild boar-pig hybrids.