Many other common diseases are caused by autoimmunity such as juvenile diabetes and low thyroid disease. It has been recently discovered that some persons who suffer with hives or angioedema also have an autoimmune disease. In these cases, autoantibodies have been formed that bind to the Fc-receptor on mast cells.
Lesson Summary. Chitin is a primary component in the exoskeletons of arthropods and crustaceans and is also found in the cell walls of fungi. It's a polysaccharide, and it's excreted by the epidermal cells in arthropods. But, it can't grow with the animal, so shedding becomes necessary.
What is chitin? It is a structural polysaccharide found in the exoskeltons of arthropods (insects, crabs, lobsters, shrimp, etc.), mollusks (shelled organisms), beak of cephalopods (squid and â¦ octopus), and in the cell walls of fungi.It is made up of saccharide monomers of N-acetylglucosamine, which is a derivative of glucose.t is a structural polysaccharide found in the exoskeltons of arthropods (insects, crabs, lobsters, shrimp, etc.), mollusks (shelled organisms), beak of cephalopods (squid and â¦ octopus), and in the cell walls of fungi. It is made up of saccharide monomers of N-acetylglucosamine, which is a derivative of glucose.