Hair follicle. Coloured scanning electron micrograph (SEM) of a section through a hair shaft and follicle (round structures at centre). A follicle is the structure from which a hair grows from the skin. The internal layers of the follicle and shaft are exposed. From centre outwards: The shaft (centre) is surrounded by an inner and outer root sheath,which in turn is surrounded by a sheath of connective tissue. The surrounding tissue contains the smooth muscle of the arrector pili muscle,which makes the hair shaft stand erect. Magnification: x1500 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4550 px × 3870 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |