lesson: digestive system. science differentiation in action all living things are made up of cells....
TRANSCRIPT
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Lesson: Digestive System
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Science Differentiation in action
All living things are made up of cells.
Food has to be broken down before it is transported to every cell.
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Science Differentiation in action
Our digestive system breaks down food and absorbs it so it can be transported around our bodies.
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Science Differentiation in action
mouth
oesophagus
stomachpancreas
small intestinelarge intestine
liver
Parts of our digestive system
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Science Differentiation in action
mouthwhere food is chewed and mixed with saliva
Parts of our digestive system
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Science Differentiation in action
the tube that carries food to the stomach
oesophagus
Parts of our digestive system
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Science Differentiation in action
stomachstores food and mixes it with digestive juices
Parts of our digestive system
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Science Differentiation in action
small intestinethe tube where broken down food is absorbed into the blood
Parts of our digestive system
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Science Differentiation in action
passes water back into the blood leaving solid waste
large intestine
Parts of our digestive system
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Science Differentiation in action
pancreasmakes digestive enzymes
Parts of our digestive system
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Science Differentiation in action
livermakes bile which helps to break down fats
Parts of our digestive system
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Science Differentiation in action
What is the function of each part?
mouth
oesophagus
stomach
pancreas
small intestinelarge intestine
liver
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Science Differentiation in action
Nutrition involves 5 stages.
Ingestion
Digestion
Absorption
Assimilation
Egestion
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Science Differentiation in action
Teeth
break down food into smaller pieces (physical digestion)
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Science Differentiation in action
There are four types of teeth.
Incisors Canines Premolars Molars
Upper or maxillary teeth
Lower or mandibular teeth
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Science Differentiation in action
Incisors
Canines
Molars
Premolars
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Science Differentiation in action
Teeth
Incisors
Canines
Premolars
Molars
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Science Differentiation in action
Teeth
Incisors – cut food
Canines – tear food
Premolars – grind food
Molars – grind food
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Science Differentiation in action
Review Questions:Label each part.
E
A
BC
DG
F
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Science Differentiation in action
Enzymes are involved in chemical digestion.
What do you think this means?
Question to think about
Enzymes act here!