Difference between revisions of "Villi"
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: [[Villi]] [[Capillary|capillaries]] inside them for a good blood supply to allow for quick [[diffusion]] into the [[blood]]. | : [[Villi]] [[Capillary|capillaries]] inside them for a good blood supply to allow for quick [[diffusion]] into the [[blood]]. | ||
: [[Villi]] have a large [[Surface Area|surface area]] to allow quicker [[diffusion]]. | : [[Villi]] have a large [[Surface Area|surface area]] to allow quicker [[diffusion]]. | ||
| − | : The [[Cell (Biology|cells]] in the walls of the [[villi]] have [[microvilli]] to provide an even bigger [[Surface Area|surface area]] for quicker [[diffusion]]. | + | : The [[Cell (Biology)|cells]] in the walls of the [[villi]] have [[microvilli]] to provide an even bigger [[Surface Area|surface area]] for quicker [[diffusion]]. |
===About Villi=== | ===About Villi=== | ||
Revision as of 16:35, 14 September 2018
Key Stage 3
Meaning
Villi are small folds in the wall of the small intestine that increase its surface area.
Adaptations of Villi
- Villi have a wall only one cell thick so the [nutrient]]s only have a short distance to diffuse into the blood.
- Villi capillaries inside them for a good blood supply to allow for quick diffusion into the blood.
- Villi have a large surface area to allow quicker diffusion.
- The cells in the walls of the villi have microvilli to provide an even bigger surface area for quicker diffusion.
About Villi
- Villi cover inside of the small intestine.
- Villi increase the surface area of the small intestine.
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