What is the carapace?

In the anatomy of animals is the carapace of the dorsal part of the exoskeleton or shell. Hanging occurs in a number of different types of animals, including many types of arthropods. The only vertebrate animals that have them are turtles and turtles. The largest group of animals that have Krupice are arthropods. This phylum consists of segmented animals with exoskeletons, which are essentially outer skeletons. Among the arthropods contain two groups species with carapaces: crustaceans and arachnids. In these species, the carapace is a hard segment of the exoskeleton, which the dorsal or upper part of the cephalothorax, a segment that forms the upper body and contains eyes and mouth. In some cases, the carapace is projected by the Cefalothorax in a thin tip called Rostrum, from the Latin word, which means "RAM". In many crustaceans, the exoskeleton is biomineralized, which means it consists mainly of mineral, usually calcium carbonate. Thanks to this composition, the carapace is very strong and rigid and protects the vulnerable body of crustacean.

In the Arachnid class, exoskeleton is not usually biomineralized to the same extent as the crustacean. For Arachnids, the term carapace still applies to the dorsal part of the exoskeleton that protects Cefalothorax. This part of the exoskeleton is located through the eyes and other organs. Some species are divided. Some biologists refer to Arachnids semolina as "prominent dorsal" to avoid confusion with the carapace in other species.

In addition to crustaceans and arachnids, some vertebrates, namely turtles and turtles, shells, have a shell. In these animals, the spine and ribs are connected to bones to form a hard shell. The dorsal part of this shell is called the carapace, while the ventral part is called the Plastron. The outer surface of the shell is protected by boards called scutes, from the Latin word, which means "shield". Some turtles lack scarves; These species are often called "soft shelled", although the bone carapace still exists under the skin.

The term 'carapace' is often used inModern English to refer to any hard shell. This use is inaccurate in two ways. First, the term correctly refers only to certain types of shells. For example, the dorsal surface of the lobster has several hard plates, but only one of them is a carapace. Moreover, in some species, as with many spiders, it is not a carapace like a hard, as it is in turtles or crustaceans, because it is simply part of the exoskeleton covering the dorsal cephalothorax.