This clip explains the purpose of food: fuel for the body. It illustrates the digestive system and explains the importance of nutrition in a diet.

This clip explains how drinking alcohol actually makes you drunk. When the molecules that make up alcohol enter your body, they change the chemical makeup and react with different parts of your body that ultimately makes you feel "drunk."

Sophie explains why we eat food: to ingest chemicals such as nutrients. She dissects a salad to illustrate the different types of nutrients our body needs: carbohydrates, proteins, and fats. She provides an example of each type of nutrient.

Hank explains how DNA and three specialized versions of RNA synthesize proteins. He delves into the process of transcription, which involves copying genetic information from DNA to RNA.

Hank explains the different types of nutrients that our body needs: water, vitamins, minerals, carbohydrates, lipids (fats), and proteins. He explains what each type of nutrient is used for and how it's used by the body.