I believe the material you are looking for in an insects exo skeleton is kitin. It is because of kitin that an insect crunches when you crush it.
Arthropods have an exoskeleton made of chitin
Chitin
Diatomaceous earth is made up of the skeletons of small animals.
Insects are covered with a skeletal protection called an "Exoskeleton", that is located on the outside of the body, rather than the inside.
Insect wings are part of a bug's skeletal system. The wings of insects are made of chitin, which is a light, extremely strong material that also makes up an insect's exoskeleton.
Yes, jawless fish have skeletons, but their skeletons are not made up of bone. Instead, their skeletons are cartilaginous, meaning their skeletons are made up of cartilage.
cartilage
Even though beetles don't have any bones in their bodies, they do have what is called a hard exoskeleton. Over 350,000 species of beetles have been identified, but it is estimated that there could be as many as 800,000 species.
Invertebrates do not have a spine (backbone) like vertebrates do. Fish, Birds, Reptiles, Amphibians, Mammals are vertebrates with internal skeletons, spines, heads, and brains with central nervous systems. All insects are invertebrates and they mostly have exoskeletons (external skeletons), and no backbones. Their internal organs make up the entire contents of their interior structures.
Coral reef
It depends on what animal you're talking about. Invertebrates like sponges and mollusks and insects have no skeleton at all. Sharks and their relatives have a skeleton made of cartilage. Fish and amphibians have bony skeletons.
The external covering of an arthropod is referred to as an exoskeleton. In some arthropods (water varieties) the exoskeleton is composed mostly of calcium carbonate. In land varieties of arthropods, such as insects, their exoskeletons are made of a material know as chitin.
Are you talking about shark skeletons? Yes, they are bones. However, they are made of a different, softer material, than most bones from other animals - cartilage.
Coral Reefs have clear bodies that are white skeletons :PP
Amphibians are vertebrates, and have backbones and skeletons. Invertebrates do not have a backbone. Some have skeletons, though--arthropods (including crustaceans and insects) have a hard exoskeleton made of chitin.
The hard external covering of insects is made of a substance called chitin.
No, some animals have an external skeleton like insects and crustaceans. Others have an internal skeleton like fish and birds and people. Some internal skeletons are made of cartilage like sharks and some are made of bone and cartilage together, like mammals.
sharks, skates, and rays have skeletons made of cartilidge
Diatomaceous earth is made up of the skeletons of small animals.