A single relatively large quantity of a substance usually one intended for therapeutic use eg bolus dose of an intravenously injected drug generally followed by smaller doses. It frequently contains a gas bubble especially after a meal.
What Is The Difference Between Bolus And Chyme Pediaa Com
What does bolus mean.
Bolus definition anatomy. Feeding term is limited to the placement of food in the mouth the manipulation of food in the oral cavity prior to the initiation of the swallow including mastication if necessary and the oral stage of the swallow when the bolus is propelled backward by the tongue. The flap that covers the trachea during swallowing so that food does not enter the lungs. Bolus digestion in digestion a bolus from latin bolus ball is a ball like mixture of food and saliva that forms in the mouth during the process of chewing which is largely an adaptation for plant eating mammals.
The fundus adapts to the varying volume of ingested food by relaxing its muscular wall. Bolus is defined by the lexicographers at oxford dictionaries as a small rounded mass of a substance especially of chewed food at the moment of swallowing. It has the same color as the food being eaten and the saliva gives it an alkaline ph.
The uppermost part of the stomach located above the entrance of the esophagus is the fundus. The bolus is a concept that was invented more 40 years ago. Bolus food that has been chewed and mixed in the mouth with saliva.
This format is suited to ruminants anatomical specificities adult and growing cattle sheep goats. Ruminants have three pre stomachs before the true stomach abomasum which is similar to the stomachs of non vertebrate species. Camp subcutaneous injection of a premeal bolus of fast acting insulin.
This can refer to. A large dose of a substance given by injection for the purpose of rapidly achieving the needed therapeutic concentration in the bloodstream the patient receives a bolus dose to reach the minimum effective analgesic concentration j. This can refer to.
The cardia is the opening from the esophagus into the stomach. Chewing helps to reduce food particles to a size readily swallowed. A masticated morsel of food or another substance ready to be swallowed eg a bolus of barium for x ray studies.
Medical definition of epiglottis. A bolus very broadly is a mass of a substance that is about to be passed into or is already inside of some sort of tube like structure of the body. Saliva adds digestive enzymes water and mucus that help chemically to reduce food particles hydrate them for taste and lubricate them for easy swallowing.
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