Savais-tu que... Civilisations anciennes/Corps humain

Christopher explains the process of digestion and how it begins in the mouth with teeth that cut food into small pieces.

Christopher explains that dust is made up of many things including dead skin cells.

Lexie explains that, despite its name, the large intestine is shorter than the small intestine and is about 1.5m long.

Lexie explains that the skin is the largest and heaviest organ of the human body.

Lexie explains that the kidneys are very important organs in the body because they eliminate the waste that travels in the blood.

Lexie explains that the human body works very well with just one healthy kidney.

Lexie explains that one third of the tongue is not visible and helps to get food down the throat.

Lexie explains that the skin is covered with millions of bacteria that help protect against diseases.

Lexie explains that bones grow and become stronger until the age of 16 for girls and 20 for boys.

Lexie explains that the skeleton serves as a base for the muscles and allows the body to be strong and protects organs such as the heart.

Lexie explains that the smallest bone of the human body is in the ear and is called the stirrup.

Lexie explains that bones repair themselves when they break; however, they need to be immobilized to get there.

Lexie explains that the smallest organ of the human body is in the brain and is called the epiphysis.

Lexie explains that there are more than 600 different types of bacteria on the tongue that cause bad breath.

Lexie explains the name and role of the three inner parts of the ear.