It is not as poisonous but it uses it as a shield when threatened it flushes blood in its shield.
Yes.
a shell
Lobsters and crabs
Chitin is the polysaccharide that is found in the exoskeleton of crabs, lobsters and insects. It is a derivative of glucose and is comparable to the polysaccharide cellulose.
Crabs, lobsters, beetles, ants.
ladybugs have a hard outer body called an exoskeleton.
No, crabs have an exoskeleton so they do not need a backbone.
chitin
No. Crabs do not have an internal skeleton (endoskeleton). They have only an external skeleton (exoskeleton) that does not have any ribs.
Hermit crabs are considered to be in the arthropods family. Hermit crabs have a hard exoskeleton made of chiton which helps provide protection and give the muscles attachment support. Although a hermit crab will grow, their exoskeleton does not so they must constantly shed said exoskeleton in favor for a new one that it grows into.
There are many different examples of insects and animals with an exoskeleton. Like ants, bees, and snails.
Exoskeleton means "outside skeleton". Animals that have no bones, but a hard outer shell have an exoskeleton- like crabs and lobsters. That would be a weird looking parrot.