Says Shells ​ — Treasures of the Sea: “The mollusk carries [calcium carbonate] in its dissolved form through its blood and secretes it through tube - like pores in the mantle,... along the growing edge of the shell. ”
Grāmatā Shells — Treasures of the Sea teikts: ” Ar moluska asinsrites palīdzību [kalcija karbonāts] tiek nogādāts mantijā un izdalās caur mantijas porām.. gar visu augošo čaulas malu. ”