Difference between revisions of "Small Intestine"
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===Meaning=== | ===Meaning=== | ||
[[File:SmallIntestine.png|right|300px|thumb|A computer generated image showing the small intestine, large intestine, rectum and anus.]] | [[File:SmallIntestine.png|right|300px|thumb|A computer generated image showing the small intestine, large intestine, rectum and anus.]] | ||
| − | The '''small intestine''' is an [[organ]] in the [[Digestive System|digestive system]] which [[Absorb|absorbs]] [[Nutrient|nutrients]] into the [[blood]]. | + | The '''small intestine''' is an [[organ]] in the [[Digestive System|digestive system]] which [[Absorb (Biology)|absorbs]] [[Nutrient|nutrients]] into the [[blood]]. |
===About The Small Intestine=== | ===About The Small Intestine=== | ||
| − | : The ''' | + | : The '''small intestine''' is a very long tube to give a large surface area to [[Absorb (Biology)|absorb]] [[nutrient]]s. |
: There is around 1kg of [[Bacteria in Digestion|bacteria]] inside the '''small intestine''' which helps [[digestion|digest]] the food. | : There is around 1kg of [[Bacteria in Digestion|bacteria]] inside the '''small intestine''' which helps [[digestion|digest]] the food. | ||
| − | : There are [[enzyme]]s in the '''small intestine''' which break down large [[molecule]]s into smaller [[molecule]]s. | + | : There are [[Digestive Enzyme|digestive enzyme]]s in the '''small intestine''' which break down large [[molecule]]s into smaller [[molecule]]s. |
: Only small [[molecule]]s can be [[absorb]]ed into the blood through the wall of the '''small intestine'''. | : Only small [[molecule]]s can be [[absorb]]ed into the blood through the wall of the '''small intestine'''. | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | The '''small intestine''' is an [[organ]] in the [[Digestive System|digestive system]] which [[Absorb (Biology)|absorbs]] [[Nutrient|nutrients]] into the [[blood]]. | ||
| + | |||
| + | ===About The Small Intestine=== | ||
| + | : The [[Small Intestine]] is where food is broken down by [[Digestive Enzyme|digestive enzymes]] including [[amylase]], [[protease]] and [[lipase]] before being [[Absorb (Biology)|absorbed]] into the [[blood]]. | ||
| + | : The [[Small Intestine]] is long and folded to increase the [[Surface Area|surface area]]. | ||
| + | : The [[Small Intestine]] has structures called [[Villi]] which are extra folds in the surface to increase the [[Surface Area|surface area]]. | ||
| + | : The [[blood]] supply to the [[villi]]s is very good to constantly supply [[blood]] with little [[nutrients]] keeping a high [[Concentration Gradient|concentration gradient]] between the food and the [[blood]]. | ||
| + | : There is around 1kg of [[Bacteria in Digestion|bacteria]] inside the '''small intestine''' which helps [[digestion|digest]] the food. | ||
| + | : Only small [[molecule]]s can be [[Absorb (Biology)|absorb]]ed into the [[blood]] through the wall of the '''small intestine'''. | ||
Revision as of 18:52, 5 November 2018
Contents
Key Stage 2
Meaning
The small intestine is part of the digestive system.
Key Stage 3
Meaning
The small intestine is an organ in the digestive system which absorbs nutrients into the blood.
About The Small Intestine
- The small intestine is a very long tube to give a large surface area to absorb nutrients.
- There is around 1kg of bacteria inside the small intestine which helps digest the food.
- There are digestive enzymes in the small intestine which break down large molecules into smaller molecules.
- Only small molecules can be absorbed into the blood through the wall of the small intestine.
Key Stage 4
Meaning
The small intestine is an organ in the digestive system which absorbs nutrients into the blood.
About The Small Intestine
- The Small Intestine is where food is broken down by digestive enzymes including amylase, protease and lipase before being absorbed into the blood.
- The Small Intestine is long and folded to increase the surface area.
- The Small Intestine has structures called Villi which are extra folds in the surface to increase the surface area.
- The blood supply to the villis is very good to constantly supply blood with little nutrients keeping a high concentration gradient between the food and the blood.
- There is around 1kg of bacteria inside the small intestine which helps digest the food.
- Only small molecules can be absorbed into the blood through the wall of the small intestine.