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Digestion, Excretion, & Respirtation

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Digestion, Excretion, & Respirtation. 4.Calories. You get energy from the food you eat. The energy in food is measured in calories. Vocabulary: calories The unit of measurement of energy in food. Some foods have more calories than others. - PowerPoint PPT Presentation
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Page 1: Digestion, Excretion, &  Respirtation

4. Calories

1

Page 2: Digestion, Excretion, &  Respirtation

You get energy from the food you eat

2

The energy in food is measured in calories

Page 3: Digestion, Excretion, &  Respirtation

3

Vocabulary:

calories

The unit of measurement of energy in food

Page 4: Digestion, Excretion, &  Respirtation

Some foods have more calories than others

4

A tomato has about 25 calories whereas a cup of ice cream has about

275 calories

Page 5: Digestion, Excretion, &  Respirtation

You could eat 11 tomatoes to equal the number of calories in a cup of ice

cream

5

Your body uses calories for all its activities

Page 6: Digestion, Excretion, &  Respirtation

Every time your hand moves or your heart beats, some calories are used

6

What happens if your body does not use all the calories in the food you

eat?

Page 7: Digestion, Excretion, &  Respirtation

The unused calories are stored as fat

7

The fat builds up in your body to make “love handles”

Page 8: Digestion, Excretion, &  Respirtation

How many calories you need depends upon the amount of energy your body

needs

8

If you are active, then your body needs lots of energy

Page 9: Digestion, Excretion, &  Respirtation

The calories you take in will be used up

9

You can eat a lot without getting fat

Page 10: Digestion, Excretion, &  Respirtation

If you are not very active, your body needs less energy

10

If you eat a lot, all the calories in your food may not get used up

Page 11: Digestion, Excretion, &  Respirtation

Your body will store the calories as fat

11

Then your weight will spiral up and your body will seem “fluffy”

Page 12: Digestion, Excretion, &  Respirtation

There are 2 things you can do to lose extra fat

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You can exercise to use more caloriesor

cut down on high-calories foods

Page 13: Digestion, Excretion, &  Respirtation

If your body has fewer calories to use then it will have to use up the stored fat

13

Using both methods are the best way to lose weight

Page 14: Digestion, Excretion, &  Respirtation

Whether you need to lose weight or not, stay away from empty calories

14

Empty calories are found in foods that are high in calories but low in

vitamins and minerals

Page 15: Digestion, Excretion, &  Respirtation

Candy, soft drinks, and other “junk” foods are empty-calorie foods

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