HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Epiglottis. Light micrograph of a section through the epiglottis, the flap of tissue located at the top of the larynx (voicebox). The epiglottis consists of cartilage (light blue) with muscles (dark blue) attached. During swallowing the larynx moves upwards so the epiglottis folds forward to form a lid, closing it off. This prevents food going down into the lungs and causing choking. This epiglottis is from a sheep. Magnification: x440 when printed 10 centimetres wide.
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