Spider simple eyes,coloured scanning electron micrograph (SEM). The arrangement of eyes differs widely between spiders,but in general they have eight eyes (here,two rows of four): several large ocelli for vision,and several smaller ones to increase sensitivity to light levels. Ocelli cannot focus or see in colour,but are used to detect differences in light intensity. A spider's main sensory apparatus is the system of sensory bristles (setae) covering its body. Magnification: x120 when printed at 10 centimetres across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hughes, Louise |
Taille de l’image : | 3661 px × 2564 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |