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. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / QA International |
Bildgröße: | 3394 px × 4462 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |