
Cochlea, Outer Hair Cells, Sem #22

by Oliver Meckes EYE OF SCIENCE
Title
Cochlea, Outer Hair Cells, Sem #22
Artist
Oliver Meckes EYE OF SCIENCE
Medium
Photograph - Photograph
Description
This image shows the outer hair cells (OHC with Stereocilia or Stereovilli, red/white) of the organ of Corti (Guinea pig). The cells are surrounded by Deiter's cells (red-brown). The tectorial membrane, which usually is connected with the tips of the stereocilia has been lifted up to get a clear view. The ear of all mammals consists of the auricle with the external ear canal, the middle ear behind the eardrum with the ossicles which are connected to the "oval window" and make the transition to the fluid-filled inner ear with the cochlea and organ of balance. The organ of Corti lies in the entire length of the cochlea. Close to the oval window the hair cells of the organ of Corti are sensitive to high tones, while towards the tip of the cochlea they are sensitive to lower tones. The tectorial membrane is connected to the tips of the hair cells’ stereovilli, which causes these stereovilli to shift and stretch when there is sound pressure. These distractions are converted into electrical impulses that are sent to the brain. Scanning electron micrograph, magnification 6500x (at 15 cm image width).
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May 19th, 2021
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