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- Human digestive system | Description, Parts, Functions | Britannica
The human digestive system is the series of structures and organs through which food and liquids pass during their processing into forms that can be absorbed into the bloodstream
- Fish - Digestion, Anatomy, Nutrition | Britannica
Fish - Digestion, Anatomy, Nutrition: The structure of a fish's digestive system consists of the mouth, teeth and gill rakers, esophagus, stomach, pyloric ceca, pancreas, liver, intestine, sometimes a cloaca, and anus The stomach and intestine varies greatly in fishes, depending upon the diet
- Human digestive system - Esophagus, Stomach, Intestines | Britannica
Human digestive system - Esophagus, Stomach, Intestines: The esophagus, which passes food from the pharynx to the stomach, is about 25 cm (10 inches) in length; the width varies from 1 5 to 2 cm (about 1 inch) The esophagus lies behind the trachea and heart and in front of the spinal column; it passes through the diaphragm before entering the stomach The esophagus contains four layers—the mucosa, submucosa, muscularis, and tunica adventitia The mucosa is made up of stratified squamous
- Definition, Function, Structure, Diagram, Facts - Britannica
Stomach, saclike expansion of the digestive system, between the esophagus and the small intestine; it is located in the anterior portion of the abdominal cavity in most vertebrates The stomach serves as a temporary receptacle for the storage and mechanical distribution of food before it is passed into the intestine
- Human digestive system - Salivary Glands, Enzymes, Digestion | Britannica
Human digestive system - Salivary Glands, Enzymes, Digestion: Food is tasted and mixed with saliva that is secreted by several sets of glands Besides the many minute glands that secrete saliva, there are three major pairs of salivary glands: the parotid, the submandibular, and the sublingual glands The parotid glands, the largest of the pairs, are located at the side of the face, below and in front of each ear The parotid glands are enclosed in sheaths that limit the extent of their
- Small intestine | Digestive Function, Structure Length | Britannica
This article summarizes the chemical actions of the digestive process For details on the anatomy and physiology for specific digestive systems, see digestive system, human, and digestive system, invertebrate
- Gastrointestinal tract | Definition, Organs, Diagram, Facts | Britannica
Gastrointestinal tract, pathway by which food enters the body and solid wastes are expelled The gastrointestinal tract includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus
- Esophagus | Structure, Function Muscles | Britannica
Human digestive system The human digestive system as seen from the front esophagus, relatively straight muscular tube through which food passes from the pharynx to the stomach The esophagus can contract or expand to allow for the passage of food
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