What is the function of the stomach in biology?
The stomach is a J-shaped organ that digests food. It produces enzymes (substances that create chemical reactions) and acids (digestive juices). This mix of enzymes and digestive juices breaks down food so it can pass to your small intestine.
What are the 4 functions of the stomach?
The four key components of gastric digestive function are its function as a reservoir, acid secretion, enzyme secre- tion and its role in gastrointestinal motility. The reservoir ca- pacity of the stomach allows it to increase its volume sig- nificantly while internal pressure increases only slightly.
What are the 5 functions of the stomach?
What enzymes are in the stomach?
In your stomach, unique chief cells secrete digestive enzymes. One is pepsin, which breaks down proteins. Another is gastric lipase, which breaks down triglycerides. In your stomach, your body absorbs fat-soluble substances, such as aspirin and alcohol.
What is stomach in digestive system?
The stomach is a hollow organ, or “container,” that holds food while it is being mixed with stomach enzymes. These enzymes continue the process of breaking down food into a usable form. Cells in the lining of your stomach secrete a strong acid and powerful enzymes that are responsible for the breakdown process.
What is the structure of stomach?
The stomach has three layers of muscle: an outer longitudinal layer, a middle circular layer, and an inner oblique layer. The inner lining consists of four layers: the serosa, the muscularis, the submucosa, and the mucosa.
Which enzymes work best in the stomach?
Enzymes in the stomach, such as pepsin ( which digests protein ), work best in very acid conditions ( pH 1 – 2 ), but most enzymes in the body work best close to pH 7. Incidentally, the stomach lining is not digested by pepsin because it is protected by a layer of mucus.
What is the shape of the stomach?
The stomach is a J-shaped organ in the upper belly (abdomen). It’s part of the digestive system. It’s between the end of the food pipe (esophagus) and the start of the first part of the small bowel (duodenum). The stomach is much like a bag with a lining.
What are the 3 divisions of the stomach?
The main divisions of the stomach are the following:
- Cardia. The cardia is the portion of the stomach surrounding the cardioesophageal junction, or cardiac orifice (the opening of the esophagus into the stomach).
- Fundus. The fundus is the enlarged portion to the left and above the cardiac orifice.
- Pyloric antrum.
What are the 3 layers of the stomach?
Layers of the stomach wall
- The mucosa (mucous membrane) is the inner lining of the stomach.
- The submucosa is a layer of connective tissue that surrounds the mucosa.
- The muscularis propria (muscularis externa) is the next layer that covers the submucosa.