• Organ systems– Groups of organs that work together and

perform a specific task– Organ systems work together to maintain

homeostasis

Digestive System

• Org

Digestive System

1. mouth (saliva + grinding)

2. Esophagus

3. Stomach

4. Small intestine (digestion + absorption)

Liver and Pancreas

• Help the small intestine in breaking down food.• Liver make bile and the pancreas creates more

enzymes

• The small intestine absorbs nutrients

Liver and Pancreas

• Nutrients: Parts of the food used by the body to grow and survive.

• Different people need different amounts of nutrients

Excretory System

• Large intestine (colon) -> Rectum (exit)

• Removes solid, liquid, and gas waste materials

Excretory System

• Lungs

• Skin

• Liver

• Kidneys

• Rectum

Nutrition Value

• A calorie is the amount of energy it takes to raise the temperature of 1 kg of water by 1 degree Celsius

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