Human hair. Coloured scanning electron microscopy (SEM) of a strand of human hair tied in a knot. Hairs are made up of dead tissue. The outside of the hair, the cuticle, is covered in overlapping scales that protect the hair's central cortex, which is made up of the fibrous protein keratin. | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / NANOFLIGHT (R) MOVIE, STEFAN DILLER |
Model Release : | Non requis |
Durée : | 20 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |