13972401
Description
Mind Map by Laurence Alecock, updated more than 1 year ago
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Created by Laurence Alecock
about 6 years ago
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The Digestive System
- Digestion Stages
- 1. Ingestion - the taking in of substances
(eg food and drink) into the body
through the mouth
- 2. Mechanical Digestion - the breakdown of
food into smaller pieces without chemical
change to the food
- 3. Chemical Digestion - the breakdown of
large insoluble molecules into small, soluble
molecules
- 4. Absorption - the movement of small food
molecules and ion's through the wall of the
intestine into the blood
- 5.Assimilation - the movement of digested
food molecules into the cells of the body
where they are used, becoming part of the
cells
- 6. Egestion - the passing out of food that
has been digested or absorbed as faeces,
through the anus
- 6. Egestion - the passing out of food that
has been digested or absorbed as faeces,
through the anus
- 5.Assimilation - the movement of digested
food molecules into the cells of the body
where they are used, becoming part of the
cells
- 4. Absorption - the movement of small food
molecules and ion's through the wall of the
intestine into the blood
- Teeth
- Incisors are in the front of the jaw,
there are 4 on the top and 4 on the
bottom
- Canines are behind
the incisors, there are
2 on top and 2 on the
bottom
- Premolars are behind
the canines, there are
4 on top and 4 on the
bottom
- Molars are at the back
of the mouth and
there are 4 on the
bottom and 4 on the
top
- Tooth Decay
- Bacteria on teeth use
sugar to survive
- Bacteria produce a sticky matrix which
traps food particles and forms a plaque
coating around the teeth
- Sugars are converted to
acids by the bacteria
- The acids remove calcium and
phosphate from the enamel and
are able to reach the dentine
- The acids remove calcium and
phosphate from the enamel and
are able to reach the dentine
- Sugars are converted to
acids by the bacteria
- Bacteria produce a sticky matrix which
traps food particles and forms a plaque
coating around the teeth
- Tooth Decay Prevention
- To prevent tooth decay you need to...
- Eat food with a low sugar
content
- Regularly brush your teeth effectively
- Eat food with a low sugar
content
- To prevent tooth decay you need to...
- Bacteria on teeth use
sugar to survive
- Incisors are in the front of the jaw,
there are 4 on the top and 4 on the
bottom
- 3. Chemical Digestion - the breakdown of
large insoluble molecules into small, soluble
molecules
- 2. Mechanical Digestion - the breakdown of
food into smaller pieces without chemical
change to the food
- 1. Ingestion - the taking in of substances
(eg food and drink) into the body
through the mouth
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