Square-tailed worm. Light micrograph of a transverse section through a square-tailed worm (Eiseniella tetraedra). The outer layer of the skin is the epidermis (dark purple),which contains glands that secrete mucus to aid the worm's movement. Beneath this are layers of muscle (red). At centre is the intestine,with the typhlosole (an invagination that increases surface area) at top. The nephridia,which are similar to kidneys are brown. At bottom centre is the nerve cord (pink). Magnification: x13 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wheeler, Dr. Keith |
Taille de l’image : | 4901 px × 3921 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |