Credit: FRANCIS LEROY & CHRIS LIPPENS, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Caption: Swallowing mechanism. Animation showing the process of swallowing (deglutition) in humans. Muscles in the tongue, pharynx and oesophagus are involved in this process, which is divided into three phases: the oral phase, pharyngeal phase and oesophageal phase. The oral phase starts when food (green) enters the mouth. Then the tongue (start of clip) pushes the mass of food (the bolus) towards the back of the mouth and the pharynx. As the bolus descends down the throat, the uvula and soft palate move upwards to cover the nasopharynx and prevent the passage of food towards the nose and nasal cavities. At the same time, the swallowing reflex starts and propels the food towards the oesophagus and away from the lungs. A flap of tissue called the epiglottis folds down covers the larynx and prevents the food entering the trachea (airway). During this process, deglutition apnea occurs, in which breathing stops for a very short time.

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Keywords: airway, anatomy. anatomical, animated, animation, biological, biology, bolus, deglutition, diagram, epiglottal, epiglottis, flaps, food, gullet, head, healthy, human body, label, labeled, labelled, labels, mouth, nasal, nasal cavity, nasopharynx, normal, oesophageal, oesophagus, oral, pharyngeal, pharynx, physiological, physiology, reflex, respiration, sagittal, section, sectioned, soft palate, swallow, swallowing, text, throat, tongue, trachea, uvula

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Swallowing mechanism

K004/2689 Rights Managed

Downloadable master

Duration: 00:00:16.01

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 144.3M

Original

Capture format: QuickTime Animation

Codec: Photo - JPEG

Please contact Science Photo Library if you require the original, or other formats.

 

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