Medicinal leech,Hirudo medicinalis officinalis
Numéro d’image : 11906744
| Medicinal leech. Medicinal leech,Hirudo medicin- alis officinalis,in a contracted state on sphagnum moss. This species of leech is a parasite which feeds on blood,although it only remains attached to the host during the feeding. The leech cuts through the skin with three jaw plates. Their saliva contains hirudin,a chemical which prevents blood from clotting whilst they feed and for some hours afterwards. A leech will drink 10- 15 millilitres of blood; another 20-50 ml will drip from the wound after the leech has dropped off. A large meal will leave the leech bloated,providing it with enough food to live for six months or more | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Dohrn, Martin |
| Taille de l’image : | 3684 px × 2480 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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