Skate specimen. Researcher's gloved hands holding a skate (Raja erinacea) caught for use in biologi- cal research at the Woods Hole Marine Biology Laboratory (MBL) in Massachusetts,USA. The skate has eyes (not seen) unlike those of any other vertebrate,in that its retinas (light-sensitive membranes at the back of the eyeball) contain only rod cells. These are the light-sensitive cells that detect low light levels. Other vertebrates have both rods and colour-detecting cone cells in their retinas. Studying rods in isolation provides information on light/dark adaptation,and could lead to new ways of treating adaptation disorders such as night blindness and retinitis pigmentosa | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Steger, Volker |
Bildgröße: | 4374 px × 3217 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |