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A simplified image showing peristalsis. In the esophagus, two types of peristalsis occur: First, there is a primary peristaltic wave, which occurs when the bolus enters the esophagus during swallowing. The primary peristaltic wave forces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds.
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The Diccionario de la lengua española [a] (DLE; [b] English: Dictionary of the Spanish language) is the authoritative dictionary of the Spanish language. [1] It is produced, edited, and published by the Royal Spanish Academy, with the participation of the Association of Academies of the Spanish Language.
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Retroperistalsis is the reverse of the involuntary smooth muscle contractions of peristalsis.It usually occurs as a precursor to vomiting.Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex.
The countries in which the Spanish Wikipedia is the most popular language version of Wikipedia are shown in yellow. Page views by country of origin on the Spanish Wikipedia The Spanish Wikipedia has the second most registered users, after the English Wikipedia , and the fifth most active users, after the English, French , German and Japanese ...
Lotería de Pozo is a variant version of the traditional Mexican Lotería, where the basic rules apply. For this version, before the game begins, players agree on how many pozos are to be completed in a row, column or diagonal pattern. A pozo is a group of images in a square. The square may contain 2 x 2 (4) or 3 x 3 (9) images [4] for a ...