The human heart has four chambers.

Adults usually have 206 bones in their body.

The femur is the longest bone in the human body.

The liver is the largest internal organ in the human body.

The brain is protected by the rib cage.

The skin is the smallest organ of the body.

The human body is made up of about 70% water.

The average adult has 32 permanent teeth.

The human eye can see ultraviolet light.

The human body has only one kidney.