False-colour scanning electron micrograph (SEM) of a section of human colon,showing the opening to one of many tubular intestinal glands (crypts of lieberkuhn) that comprise the colonic mucosa. The gland is surrounded by goblet (mucous-secreting) cells. Underneath the mucosa is a layer of smooth muscle,contraction & relaxation of which propels the contents of the colon towards the rectum. In the colon,absorption of water,sodium,vitamins & other mineral takes place; the watery chyme that enters the colon is reduced to semi-solid faeces. Absorption of certain drugs (anaesthetics,sedatives,steroids & tranquilizers) takes place in the colon. Magnification: X 180 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Photo Insolite Realite |
Taille de l’image : | 4903 px × 3405 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |