Savais-tu que... Métro et ruines

We measure up to 2 centimeters taller when we wake up. Christopher introduces us to this phenomenon.

Christopher explains that it is more difficult for our body to sulk than to smile, because the muscles to sulk are less often used than those to smile.

Christopher explains that the brain needs water to work well, so it's important to drink plenty of water throughout the day.

Christopher explains that the color of the tongue can express a person's state of health.

Christopher explains the role of each hemisphere of the brain.

Christopher explains that identical twins are called monozygotes because they are two sperm that fertilized the same egg that subsequently split.

Christopher explains that even if you eat your head down and your feet up, the muscles of the esophagus and intestines will still be able to digest the food.

Christopher explains that the pores of the skin enlarge when the human body is warm in order to let the perspiration out and thus lower the body temperature.

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.