A group of garden snails,Helix aspera,sheltering a flower pot in a garden in Norfolk UK. The pictures shows a snail moving across a mass of stationary snails. The hard shell of snails protects the soft tissue within it ( the mantle ). In this picture the foreground snail has its head extended,showing the tentacles bearing terminal eyes. As the picture shows,the shell of a snail is not bilaterally symmetrical. All snails in the Helicid family coil the same way,described as dextral or "right-handed". The shell is made from calcium carbonate,and can be repaired by the snail if it suffers small damage. The calcium carbonate is coated on the outside with a layer of organic material,the periostracum,which gives the snail its colour and pattern | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Burgess, Dr. Jeremy |
Bildgröße: | 3468 px × 5212 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |