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Home > All Images > 1992 > June > 25 Jun 1992

Images Dated 25th June 1992

Choose from 11 pictures in our Images Dated 25th June 1992 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


SEM of rod & cone cell of the retina Featured 25 Jun 1992 Print

SEM of rod & cone cell of the retina

False-colour scanning electron micrograph (SEM) of rod and cone cells of the eye retina. Cone cells (blue) and more numerous rod cells (pink, purple) are specialized light-sensitive cells. They occur on the surface of the retina. They are responsible for detecting visible images, which are transmit- ted as nerve impulses to the optic nerve and the brain. There are about 130 million rod cells in the human retina; they detect light intensity and so are important for day and night vision. While the less numerous cone-like cone cells (about 6.5 million in the human retina) respond specifically to colour. Magnification: x730 at 6x7cm size. Magnification: x1120 at 4x5 inch size

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY