The human body changes throughout life but only one part does not change, you know what it is?

Almost all parts of the human body from the skin, hair, and nails to the heart are regenerated after a certain period of time but there is a certain 'cruel' part that does not change.

1. How does the lungs work in the human body?
2. What happens inside the human body when it is about to drown?

Your skin surface is renewed monthly, every 10 years you will have a new skeleton and muscles will be regenerated after 15 years but only the hammock of the eyes is unchanged throughout life. So take care of your eye retina carefully.

The video below will show you how the body's changes throughout life take place.