Stomach
The stomach produces gastrin that activates the secretion of HCl and pepsinogen within itself.
The esophagus transports food to the stomach. Once there, the stomach aids in food digestion through muscle contractions and chemical enzymes.
The stomach is made up of three layers: an outward longitudinal layer that mechanically breaks down food, a center circular layer, and an oblique layer.
Food is further broken down by acids like hydrochloric acid creating a fluid called chyme. By secreting stomach acids, a network of cells, including parietal cells, chief cells, G-cells, mucous neck cells, and D-cells, aid in the chemical digestion of food.
Food can also be stored in the stomach until it is digested further down the digestive system.
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