Search Results for: Crustaceans
members of kingdom animalia. they are eucoelomate protostomes with well-developed organ systems, and cuticular exoskeletons containing chitin, which place them in the phylum arthropoda. this phylum represents the largest group of living animals on earth. it includes spiders, scorpions, ticks, mites, crustaceans
members of kingdom animalia. they are eucoelomate protostomes with well-developed organ systems, and cuticular exoskeletons containing chitin, which place them in the phylum arthropoda. this phylum represents the largest group of living animals on earth. it includes spiders, scorpions, ticks, mites, crustaceans...
https://www.georgiaaquarium.org/wp-content/uploads/2018/10/Ecdysis-in-Arthropods.pdf
to be certain, the prevailing view among paleontologists is that the scales, claws, beaks, and some protective armor of dinosaurs most likely were composed of a type of keratin. in crossopterygian fish, the outer layer of cosmoid scales was keratin. among the invertebrates , arthropods such as crustaceans
often have parts of their armor or exoskeleton made of keratin, sometimes in combination with chitin , which is a hard, semitransparent polysaccharide that is the main component of the shells of crustaceans, such as crabs , lobsters , and shrimp . in arthropods, however, chitin is frequently modified...
https://www.newworldencyclopedia.org/entry/Keratin