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Tne Integumentary System 



A. Introduction 



1. Definition and general structure of the vertebrate integument or skin 



2. General functions of the skin 



3. Basic structure of the vertebrate skin in the embryo 



a. Component parts of the developing integument 



b. Origin of the component parts of the early integument 

 I ) Origin of the epidermal component 



2) Origin of the dermal or mesenchymal component 



3) Origin of chromatophores 



B. Development of the skin in various vertebrates 



1. Fishes 



a. Anatomical characteristics of the integument of fishes 



b. Development of the skin in the embryo of the shark. Squaliis ucunthius 



1 ) Epidermis 



2) Dermis 



3) Development of scales and glands 



c. Development of the skin in the bony ganoid fish. LepisosU'us (LepiJoste 

 osseus 



d. Development of the skin in the tcleost fish 



2. Amphibia 



a. Characteristics of the amphibian skin 



b. Development of the skin in Witiirns nuu ulo.sus 



c. Development of the skin in the frog, Runa pipiens 



3. Reptiles 



a. Characteristics of the reptilian skin 



b. Development of the turtle skin 



4. Birds 



a. Characteristics of the avian skin 



1 ) Kinds of feathers 



2) General structure of feathers 



a) Pluma or contour feather 



b) Plumule or down feather 



c) Filoplume or hair feather 



d) Distribution of feathers on the body 



b. Development of the avian skin 



1 ) Development of the epidermis, dermis, and nestling dov\'n feather 



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