Patella pellucida Patella pellucida Patella pellucida, common name the blue-rayed limpet, is a species of small saltwater limpet, a marine gastropod mollusc in the family Patellidae, the true limpets. This limpet occurs off the eastern Atlantic coasts from Iceland and Norway, to Portugal. It is absent from the Baltic Sea, East Denmark, Belgium and the Netherlands. Up to 15 mm long when fully grown, this species is easily identified by its translucent amber shell with brilliant blue spots running in lines across the top of the shell. The blue-rayed limpet lives primarily on "Laminaria" (kelp) in strong flowing water but also on
Composition of the human body g in men, ~2.3 g in women Of the 94 naturally occurring chemical elements, 60 are listed in the table above. Of the remaining 34, it is not known how many occur in the human body. Most of the elements needed for life are relatively common in the Earth's crust. Aluminium, the third most common element in the Earth's crust (after oxygen and silicon), serves no function in living cells, but is harmful in large amounts. Transferrins can bind aluminium. The composition of the human body is expressed in terms of chemicals: The composition of the human body can be