2006-07-27 20:20:16 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
They create them.
When a snail grows, the shell has to be enlarged to fit the snail's body. To accomplish that, a snail gradually extends its shell by adding new parts at the shell opening.
The growth process is carried out in two stages: In the first stage the thin, transparant and organic outer layer (periostracum) is created, on which the calcified inner layers are deposited in the second stage. The shell material is secreted by specialized cells of the mantle.
Apple snails can grow their shell very fast under the right conditions: peak rates of 0.5 cm (0.2 inch) new shell a day do occur.
2006-07-28 03:15:04 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Shell-less snails sneak some salty shells from stupid Sally as she still sometimes sells stinky seashells with her saucy sister Suzie by the seashore Sundays in some city south of Santa Cruz since her sweet son Sammy stuck something stiff in someone's silly stepchild sucking sticky syrup sliding slowly off slippery seals sunning since Saturday's super sale of shiny-soled shoes soiled by sleepy sheep!
2006-07-28 04:28:35 · answer #2 · answered by nomad 3 · 0⤊ 0⤋
snails protect to himself their predator with the help of his shell.
2006-07-28 10:40:19 · answer #3 · answered by shahrukh 2 · 0⤊ 0⤋
They pimp their semi shells up making em hard and curved and cut...sitting on 2tfo's!
2006-07-28 03:45:13 · answer #4 · answered by passionfruit2571 3 · 0⤊ 0⤋
they make them (secrete stuff)
2006-07-28 03:49:06 · answer #5 · answered by skybluezoo 2 · 0⤊ 0⤋
they steal them from crabs
2006-07-28 03:21:58 · answer #6 · answered by papaofgirlmegan 5 · 0⤊ 0⤋