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Cross section through an arm of a starfish

Legend:

1  dermis
2  papula
3  spine
4  pyloric caeca
5  ambulacral muscles
6  ambulacral ossicle
7  radial canal of water vascular system
8  ampullae
9  ad-ambulacral ossicle
10  lateral transverse ambulacral muscle
11  tube feet
12  suckers + mucus glands
13  ambulacral groove

English name: Common starfish
Scientific name: Asterias rubens
Familia: Asteriidae
Classis: Asteroida
Phylum: Echinodermata
Regnum: Animalia


last modified: 5 Jun 2014