50 bones
they WERE made out of turtle shells and cattle bones
The shells are made of sand and scales.
50 bones
32
28
"There are two parts to the shell of a turtle: the upper portion is called the "carapace" and the bottom half is called the "plastron." Both shells are actually made of many fused bones. The carapace is the fusion of about 50 bones - the ribs and vertebrae. The plastron is the fusion of bones including the clavicles (collar bones), bones between the clavicles, and portions of the ribs. A bony bridge joins the carapace and the plastron along the side of the turtle. Some turtles have a moveable joint, usually in the plastron, which acts as a "hinge" and allows the turtle to pull the carapace and plastron together tightly, while the turtle retracts its body into the shell. Shells have a blood and nerve supply, so bleeding and pain can result if the shell is"For more information: Source: http://www.peteducation.com/article.cfm?c=17+1797&aid=2700
typically 8
Turtles do not change shells
NO . Turtles shells are natural and grow with the turtle. Plastic is man made .
Yes, a turtle is a vertebrate.All reptiles are vertebrates, because they all have spines.The spine of a turtle is attached to the inside roof of their shells. Making it physically impossible for them to shed shells or leave their shells.
Calcium
Oracle bones were used during the Shang Dynasty in ancient China. People would write questions on animal bones and turtle shells, then someone would heat metal in a fire and place it against the bone/shell, causing it to crack. The cracks would then be interpreted to answer the question.