Split hair. Coloured scanning electron micrograph (SEM) of a split human head hair. Here,the hair has split midway along the shaft,rather than at the end. Hair is made up of a fibrous protein (keratin). It consists of three layers: an outer layer or cuticle,scaly in normal hair but lost in this damaged specimen; a cortex (visible) containing hair colour pigments; an inner medulla or core (not seen). Hair may split due to excessive shampooing,bleaching,combing,or blow- drying. Occasionally,brittle hair can be a sign of severe vitamin or mineral deficiency. Magnification: x160 at 6x4.5cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Burgess, Dr. Jeremy |
Bildgröße: | 2480 px × 3320 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |