lesson: digestive system. science differentiation in action all living things are made up of cells....
Post on 31-Mar-2015
217 Views
Preview:
TRANSCRIPT
Lesson: Digestive System
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.
Science Differentiation in action
Our digestive system breaks down food and absorbs it so it can be transported around our bodies.
Science Differentiation in action
mouth
oesophagus
stomachpancreas
small intestinelarge intestine
liver
Parts of our digestive system
Science Differentiation in action
mouthwhere food is chewed and mixed with saliva
Parts of our digestive system
Science Differentiation in action
the tube that carries food to the stomach
oesophagus
Parts of our digestive system
Science Differentiation in action
stomachstores food and mixes it with digestive juices
Parts of our digestive system
Science Differentiation in action
small intestinethe tube where broken down food is absorbed into the blood
Parts of our digestive system
Science Differentiation in action
passes water back into the blood leaving solid waste
large intestine
Parts of our digestive system
Science Differentiation in action
pancreasmakes digestive enzymes
Parts of our digestive system
Science Differentiation in action
livermakes bile which helps to break down fats
Parts of our digestive system
Science Differentiation in action
What is the function of each part?
mouth
oesophagus
stomach
pancreas
small intestinelarge intestine
liver
Science Differentiation in action
Nutrition involves 5 stages.
Ingestion
Digestion
Absorption
Assimilation
Egestion
Science Differentiation in action
Teeth
break down food into smaller pieces (physical digestion)
Science Differentiation in action
There are four types of teeth.
Incisors Canines Premolars Molars
Upper or maxillary teeth
Lower or mandibular teeth
Science Differentiation in action
Incisors
Canines
Molars
Premolars
Science Differentiation in action
Teeth
Incisors
Canines
Premolars
Molars
Science Differentiation in action
Teeth
Incisors – cut food
Canines – tear food
Premolars – grind food
Molars – grind food
Science Differentiation in action
Review Questions:Label each part.
E
A
BC
DG
F
Science Differentiation in action
Enzymes are involved in chemical digestion.
What do you think this means?
Question to think about
Enzymes act here!
top related