The underlying structure of a turtle shell is bone. Some turtles can live to be over 100 years old. Some turtles hibernate. Most turtles have 4 toes on each limb. Turtles can have roundworms.
All turtles are vegetarians.
Turtles are warm-blooded. Ear infections are common in turtles. There is no longer a risk of getting Salmonella from turtles. Turtles can get gout. Turtles have a poor sense of smell.