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| Pregunta | Respuesta |
| What is the digestive system? | The organ system running from the mouth to the anus where food is digested. |
| Order of digestive system | Mouth Oesophagus Stomach Liver Gall bladder Pancreas Small Intestine Large intestine Anus |
| Way to remember the digestive system | My Orang-utan Smells Like Glue Perfume So Lets Roll |
| Mouth | Food enters the body here. Teeth mechanically break down the food. Amylase in saliva breaks down the starch |
| Oesophagus | Has a muscular wall which pushes the food bolus along by a process called peristalsis. |
| Stomach | Has a thick muscular wall and a mucus lining. It contains acid which kills bacteria and enzymes which digest fats (lipids) and proteins. |
| Liver | This helps break down fats by producing bile and emulsifying fat (breaks it down) |
| Gall bladder | Stores bile made by the liver |
| Pancreas | This produces 2 hormones, insulin and glucagon, which helps to control blood sugar levels. It is also adapted for diffusion. |
| Small intestine | The main site of absorption of nutrients into the bloodstream. |
| Large intestine | The main site for the removal of water to produce faeces |
| Anus/Rectum | The exit to the large intestine where the faeces exits the body |
| What factors affect the rate of diffusion? | .thin walls .good blood supply .large surface area |
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