BIOL 202 Study Guide - Final Guide: Gill Slit, Chondrichthyes, Pharyngeal Jaw

• School: Queen's University
• Department: Biology
• Course: BIOL 202
• Professor: Victoria L Friesen

Document Summary

Mesoderm flanking the notochord becomes segmented into somites (skeleton and skeletal muscles) Integument = external covering of animals hypodermis, dermis (from mesoderm), epidermis (from ectoderm) Protects animal from chemical, mechanical injury and microorganisms fish: multilayered and contain mucous and sensory cells bone in form of denticles fish: thick skin, secrete protective cuticle with slime glands that covers the entire body. Largest organ contains blood vessels, nerves, mucous glands, connective tissues, adipose tissues, Functions in protection, communication, respiration, excretion, osmoregulation, separates skin from deeper tissues. : sratified epidermis, dermis with mucous and serous glands + pigmentation cells, Keratin in outer layers, slimy, moist body help gas exchange and escape from prey, some have poison glands turtles), beaks (turtles), rattles, claws, plaques, spiny crests resists abrasion, dehydration, protects like armor, molting. : thick skin, lacks glands, modified into keratinized scales, scutes (thick scales snakes, : hair, greater variety in glands, highly stratified, dermis very thicnk compared to.