Nautilus shell. Section through the shell of a nautilus (Nautilus sp.). The animal itself has been removed,allowing the nacreous (mother-of- pearl) inner chambers and spiral structure to be seen. The nautilus is a marine cephalopod related to the squids. The animal lives in the last and largest chamber of its shell,and is connected to the rest of it by a long tube called the siphuncle (parts seen on shell partitions). It regulates its buoyancy by using its siphuncle to vary the gas- liquid ratio in the smaller chambers. As the animal grows,new chambers are added. Nautiluses live in the warm Australasian seas,and use their tentacles to capture crustaceans from the seabed | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Camazine, Scott |
Bildgröße: | 2467 px × 3732 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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