Description: The GI tract contains four layers. It includes the mucosa (innermost layer), underneath it is the submucosa, followed by the muscularis propria & lastly, the serous layer or serosa.
Function: The four layers of each have different functions. The mucosa functions in absorption & secretion. The submucosa contains mucous secreting glands. The muscularis propria are used for peristalsis. Lastly, the serosa contains blood vessels, lymphatics & nerves.
Location: The mucosa is found in the inner lining of the stomach. The submucosa surrounds the mucosa. The muscularis propria is the next layer that covers the submucosa. And lastly, the serosa is the next layer that covers the submucosa.
Description: The gastric folds (rugae) are coiled secretions of tissue that exist in the mucosal & submucosal layers of the stomach.
Function: The gastric rugae allows the expansion of the stomach after the consumption of foods and liquids. This results in greater surface area, thereby helpful in absorbing nutrients.
Location: It is found in the inner oblique layer of the stomach.
Description: A tooth is a hard, calcified structure used to break down food. They are made up of different layers namely enamel, dentin, pulp cavity, and cementum.
Function: Teeth are essential for chewing food (mastication), helping people to speak, to defend, and to smile. It also gives shape to their face and performs other specialized functions.
Location: It is found in the jaws and in or around the mouth of many vertebrates.
Four layers of the GI tract
Description: The GI tract contains four layers. It includes the mucosa (innermost layer), underneath it is the submucosa, followed by the muscularis propria & lastly, the serous layer or serosa.
Function: The four layers of each have different functions. The mucosa functions in absorption & secretion. The submucosa contains mucous secreting glands. The muscularis propria are used for peristalsis. Lastly, the serosa contains blood vessels, lymphatics & nerves.
Location: The mucosa is found in the inner lining of the stomach. The submucosa surrounds the mucosa. The muscularis propria is the next layer that covers the submucosa. And lastly, the serosa is the next layer that covers the submucosa.
Wall of the Stomach with rugae
Description: The gastric folds (rugae) are coiled secretions of tissue that exist in the mucosal & submucosal layers of the stomach.
Function: The gastric rugae allows the expansion of the stomach after the consumption of foods and liquids. This results in greater surface area, thereby helpful in absorbing nutrients.
Location: It is found in the inner oblique layer of the stomach.
Tooth
Description: A tooth is a hard, calcified structure used to break down food. They are made up of different layers namely enamel, dentin, pulp cavity, and cementum.
Function: Teeth are essential for chewing food (mastication), helping people to speak, to defend, and to smile. It also gives shape to their face and performs other specialized functions.
Location: It is found in the jaws and in or around the mouth of many vertebrates.