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Ingestion is the consumption of a substance by an organism. In animals, it normally is accomplished by taking in a substance through the mouth into the gastrointestinal tract, such as through eating or drinking. In single-celled organisms, ingestion takes place by absorbing a substance through the cell membrane.
Indigestion, also known as dyspepsia or upset stomach, is a condition of impaired digestion. [2] Symptoms may include upper abdominal fullness, heartburn, nausea, belching, or upper abdominal pain. [3]
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the digestive system that leads from the mouth to the anus.The GI tract contains all the major organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines.
The opening between the lips is termed the oral fissure, and the opening into the throat is called the fauces. [9] At either side of the soft palate are the palatoglossus muscles which also reach into regions of the tongue. These muscles raise the back of the tongue and also close both sides of the fauces to enable food to be swallowed.
Egestion (Excretion): Removal of undigested materials from the digestive tract through defecation. Underlying the process is muscle movement throughout the system through swallowing and peristalsis. Each step in digestion requires energy, and thus imposes an "overhead charge" on the energy made available from absorbed substances.
There are two primary sources of signals that stop eating: short-term signals come from immediate effects of eating a meal, beginning before food digestion, and long-term signals, that arise in adipose tissue, control the intake of calories by monitoring the sensitivity of brain mechanisms to hunger and satiety signals received.
Although still considered a disorder of infancy and cognitive disability at that time, the difference in presentation between infants and adults was well established. [ 22 ] Studies of rumination in otherwise healthy adults became increasingly common starting in the 1900s, and the majority of published reports analyzing the syndrome in mentally ...
A health professional demonstrates how to offer oral medication to a dummy. Oral administration of a liquid. Oral administration is a route of administration whereby a substance is taken through the mouth, swallowed, and then processed via the digestive system.