Cochlea with Sensory Hair Cells (IMAGE) Boston Children's Hospital Caption Sensory hair cells in the cochlea of a Beethoven mouse treated with TMC2 gene therapy. In this confocal microscopy image, microvilli are shown in red and cell bodies in green. The human ear has about 16,000 sensory hair cells. Credit (Image: Charles Askew) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.