This is achieved by the muscular layers of the gut tube as well as the oral cavity. There are 3 layers of muscle (and 4 in the stomach). Muscularis mucosae, circular muscle and longitudinal muscle
Rhythmic activity in smooth muscle
These is very slow waves moving through the intestines and at its peak it trigger action potentials which move through the intestine.
Motility
moves food though the GIT mechanical breaksdown mixing and contact
it needs to be adaptable though This changes with hormones and signalling
Peristalsis segmentation MMC
Oesophagus
- swallowing reflex
- oseophagueal peristalsis
- some problems
- reflux - limited by lower oesophageal sphincter
Stomach
- storage/mixing/breakdown
- proximal - storage
- Distal peristalsis and retropulsion
- solids slow liquid fast
- cephalic hgastric and intestinal vomiting
Small intestine
- mix/absorb propel
- segmentaion
- pedular movments
- hormaonal nervous reflexes Large
- storage/ water absorption
- slow segmentation
- mass movements