Nutrients: Introduction to the digestive system

NEWS

• You will have a quiz on Monday on the Skeletal System, Muscle System, and Skin. – Study your notes and review chapter 18 of the

text.– You may complete the chapter 18 Assessment on

pp. 514-515 by Monday for (up to) 6 bonus points.• #1-15, 16, 18, 21, and 23.

Why is it important to study nutrients?

• Nutrients are important because they are substances in food that give cells energy and materials to develop, grow and repair themselves if necessary

• 6 kinds:– Carbohydrates– Proteins– Vitamins– Fats– Minerals– Water

• These are available in food and broken down in your digestive system

• What nutrients are needed to repair a broken bone?

Carbohydrates• Main source of energy for

your body• 3 types:– Sugar, starch and cellulose

• Foods like:– Fruit– Honey– Potatoes– Pasta

Proteins

• Used by your body for growth • Replaces and repairs (fixes) body cells• Foods like:– Meat– Beans– Cheese

Fats

• Also gives your body energy• Helps your body absorb some

vitamins • Foods like:– Fish – Red meat– Cooking oils

Vitamins

• Only need vitamins in small amounts• Helps your body grow and perform daily

activities• Foods like:– Fruits and vegetables– Example: Vitamin C

Minerals

• Used in chemical reactions in your body to build new cells, carry oxygen and other activities

• Example: calcium from milk and milk products helps keep bones strong

Water• Most of the nutrients

cannot be used by your body unless they are dissolved in water

• Need to drink about 2L to balance the water you lose each day

• Did you know? You can live a few weeks without food, but only live a few days without water

Did you know? Around 60% of your body is water

Food Groups• No one food has all the

nutrients you need, so we have to eat a variety of foods

• Foods that have the same nutrients are in the same food group– Recommended that

you eat a certain amount from each group every day

Food Label ActivityType of Nutrients in the Food Label in grams (g) or percentages (%)

Carbohydrates Fats Proteins Minerals Vitamins Healthy? Why/why not?

Type of food (guess!)

Nutrients homeworkMeal Breakfast Lunch Dinner Snacks What did you eat?

Describe the food groups that were included in this meal.

Describe the vitamins you have eaten in this meal.

Describe the minerals you have eaten in this meal.