Difference between revisions of "Digestive System"
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: The '''digestive system''' takes large [[insoluble]] [[molecule]]s and breaks them down into small [[soluble]] [[molecule]]s to be [[Absorb (Biology)|absorbed]]. | : The '''digestive system''' takes large [[insoluble]] [[molecule]]s and breaks them down into small [[soluble]] [[molecule]]s to be [[Absorb (Biology)|absorbed]]. | ||
There are several [[organ]]s in the '''digestive system''' you should know: | There are several [[organ]]s in the '''digestive system''' you should know: | ||
− | *[[Mouth]] | + | *[[Mouth]] - Breaks down food mechanically with [[teeth]] and adds [[saliva]] using the [[Salivary Gland|salivary gland]]s to make food easier to swallow. |
− | *[[Oesophagus]] | + | *[[Oesophagus]] - Uses [[peristalsis]] to move food from the [[mouth]] to the [[stomach]]. |
− | *[[Stomach]] | + | *[[Stomach]] - Starts chemical [[digestion]] of food in an [[Acid|acidic]] environment. |
− | *[[Liver]] | + | *[[Liver]] - Makes [[bile]] to [[Neutralisation|neutralise]] [[Stomach Acid|stomach acid]] and break down [[fat]]. |
− | *[[Pancreas]] | + | *[[Pancreas]] - Makes [[enzyme]]s to chemically [[Digestion|digest]] food. |
− | *[[Small Intestine]] | + | *[[Small Intestine]] - [[Absorb (biology)|Absorb]]s food into the [[blood]] through [[villi]] |
− | *[[Large Intestine]] | + | *[[Large Intestine]] - [[Absorb (biology)|Absorb]]s water from undigested food called [[faeces]]. |
− | *[[Rectum]] | + | *[[Rectum]] - Stores [[faeces]] before [[egestion]]. |
− | *[[Anus]] | + | *[[Anus]] - A ring of [[muscle]] that holds [[faeces]] in. |
{| class="wikitable" | {| class="wikitable" |
Revision as of 11:30, 14 September 2018
Contents
Key Stage 2
Meaning
The digestive system is the parts of the body that we use to get nutrients out of our food.
About The Digestive System
- The digestive system breaks food down into small pieces.
- The small pieces can then be absorbed into the body.
- The bits the body does not need leave the body as faeces.
- The digestive system is made up of several parts:
Key Stage 3
Meaning
The digestive system is an organ system that breaks down food for absorption into the blood.
About The Digestive System
- The digestive system breaks down food mechanically and chemically before absorbing nutrients into the blood.
- The digestive system takes large insoluble molecules and breaks them down into small soluble molecules to be absorbed.
There are several organs in the digestive system you should know:
- Mouth - Breaks down food mechanically with teeth and adds saliva using the salivary glands to make food easier to swallow.
- Oesophagus - Uses peristalsis to move food from the mouth to the stomach.
- Stomach - Starts chemical digestion of food in an acidic environment.
- Liver - Makes bile to neutralise stomach acid and break down fat.
- Pancreas - Makes enzymes to chemically digest food.
- Small Intestine - Absorbs food into the blood through villi
- Large Intestine - Absorbs water from undigested food called faeces.
- Rectum - Stores faeces before egestion.
- Anus - A ring of muscle that holds faeces in.
The mouth is an organ is used to start digestion of food. | The oesophagus is an organ that connects the mouth to the stomach. | The stomach is an organ that digests food. |
In the digestive system the liver produces bile which neutralises the acid from the stomach and helps break down fat. | In the digestive system the pancreas produces enzymes to chemically break down food. |
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