Polarised light micrograph of a spine of a sea urchin (Echinus sp.). The test and spines of sea urchins are composed of calcium carbonate. Each spine articulates with a tubercle on the test. The elaborate structure of the spines when seen in cross section has made them a popular subject for microscopists. Magnification: x68 at 10cm wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lowry, Steve |
Taille de l’image : | 3961 px × 2652 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |