Each of the three pairs of organs secreting a liquid (saliva) that contains a digestive enzyme; it is used to moisten food to facilitate its ingestion. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / QA International |
Taille de l’image : | 3394 px × 4462 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |