Topic: Nutrition Aim: Describe nutrition & the 2 types of digestion. Do Now: HW:

Topic: Nutrition Aim: Describe nutrition and the 2 types of digestion. Do Now: Describe the importance of carbohydrates. Take out your ISN activity from yesterday. HW: Don’t forget the 5 food labels for Thursday’s lab. Science Fair Procedures due November 24 th.

Nutrition When organisms take in & use materials needed for energy & all life processes

Processes involved in heterotrophic nutrition

1. Ingestion: to take IN food

2. Digestion: breakdown of food

3. Egestion: removal of undigested food (solid waste)

Mechanical Digestion Large pieces of food are broken down into smaller pieces

Increases food’s surface area to speed up chemical digestion

Example: –Teeth –Churning of food in the stomach

Chemical Digestion COMPLEX molecules are broken down into smaller molecules

HOW? By using digestive enzymes

Carbohydrates  simple sugars (glucose)

Proteins  amino acids

Lipids  glycerol and fatty acids

Let’s summarize… 1.Identify the two types of nutrition. 2.Describe the 3 processes involved with heterotrophic nutrition. 3.Explain the difference between mechanical and chemical digestion. 4.Where does mechanical digestion occur in our bodies? Chemical digestion? 5.Identify the chemical needed for chemical digestion to occur.

Identify the type of nutrition and digestion that is being described. 1.Food is broken down into smaller pieces. 2.Organisms make their own food. 3.Carbohydrates are broken down into simple sugars. 4.Increases surface area for chemical digestion. 5.Proteins are broken down into amino acids. 6.Teeth are used to break down food. 7.Enzymes are used.