### carbohydrate | polysaccharide:

Chitin
* Most chitin has properties
  - protects arthropods
* Some chitin contains blood.
* Some chitin has equivalents
  - hardness equivalents
  - is synthesized from monosaccharides
* also forms their outside body
  - makes up the outer shell of insects and crustaceans
* can be hard or soft and flexible.
* cellulose-like substance that has a variety of uses.
* cellulose-type polymer that is the outside armor coat of an arthropod.
* complex carb that is strong and contains subunits of nitrogen containing sugars.
* flexible polymer and it is difficult to fragment.
* found in their cell walls, They are sessile organisms.
* has a complicated structure immune to most general enzymes
* is also a primary cell wall constituent of fungi
  - abundant in fungi, worms, spiders, insects and some algae
  - present in many other living organisms, such as insects and mushrooms
  - the stuff of which lobster and crab shells are made
  - an important constituent of the cell-walls of Fungi
* is chemically similar to cellulose and starch, the abundant plant fibers
  - starch, the most abundant plant fibers
  - exoskeleton material
* is found in cell walls of fungi, algae and in the exoskeletons of arthropods
  - the exo-skeletons of shrimp, crabs and other shellfish
  - yeasts, fungi, animals, and plants
  - highly resistant to enzymatic breakdown
  - indigestible by humans
  - insoluble in water
* is one of the most abundant biomaterials on earth and it is tough
  - polysaccharides found in nature
  - primary components in the body wall of nematicides
  - organic matter
  - produced from the processing waste of shellfish, krill, clams, oysters, squid, and fungi
  - similar in structure to plant cellulose, but is much tougher
* is the main component of the exoskeleton of all crustaceans
  - major polysaccharide of the shells of crustaceans
  - outer part of various shellfish
  - primary cell wall constituent in the Kingdom Fungi
  - same thing of which lobster and shellfish shells are made
  - second most prevalent polymer on the face of the earth
  - substance that makes up the shells of arthropods such as insects and spiders also
  - used in industry in many processes
  - what fungi produce to make their cell membrane
* is, after wood, the most plentiful organic fiber on Earth.
* major component of the insect exoskeleton.
* makes up the skin of nematodes and the exoskeleton of insects, shrimp, and many arthropods.
* naturally occurring polymer found in many fungi.
* polymer of N-acetylglucosamine and is present in the exoskeleton of insects
  - that can be found in anything from the shells of beetles to webs of spiders
* polysaccharide composed of aminoglucose moieties
  - found in insect exoskeletons
  - like cellulose
  - that occurs widely in nature
* substance similar to wood.
* sugar kind of like table sugar.
* tough, resistant surface material that is also relatively indigestible.
* very adaptive material for a creature
  - firm material, and it help protect an insect against harm and pressure

Glycogen
* Most glycogen is stored in the fat body and to a lesser extent is found in flight muscle cells.
* Some glycogen is stored in the liver and some is stored the muscles themselves.
* includes atoms.
* includes chemical chain
  - groups
* is polysaccharides
* stores in muscles.