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25234A

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Image #   25234A
Name:   Convict cichlid fish scales (Cichlasoma nigrofasciatum)
Copyright:   Copyright 2009 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Convict cichlid fish scales and skin (Cichlasoma nigrofasciatum). Fish scales are dermally derived, specifically in the mesoderm. This fact distinguishes them from reptile scales. Scales are the overlapping series of hard plates that cover a fish's body. Scales serve to protect the body from the outside dangers such as predators and infection. Not all fish share the same kind of scales. There are four main types of scales: placoid, ganoid, ctenoid, and cycloid. Fish scales are covered with fish skin, a fine layer of epithelial cells. Fish skin like many other vertebrates (amphibians, reptiles, birds, mammals) consists of two principal layers - superficial epidermis and deeper dermis. The epidermis consists of two or more layers. The deepest is a series of closely packed, discrete cells called the germinal layer, or stratum germinativum. The outer epidermal cells are formed from the germinal layer. Body fish slimes are produced by epidermal cells and their degradation. Epidermal cells can have highly convoluted surfaces that retain slime, which has a primary function of protection from pathogens and parasites.
Magnification*: x24
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   25234A 06.01.09 miscellaneous vertebrates fish zebra cichlid Hawaii fish epithelial fish epithelial cell fish epithelial cells fish epithelium fish scale fish scales fish skin fish vertebrate fresh water fish freshwater fish misc. vertebrates vertebrate vertebrates SEM Cichlasoma nigrofasciatum Amatitlania nigrofasciata Archocentrus nigrofasciatum Cichlasoma Amatitlania Archocentrus epithelial cell epithelial cells fish epidermis germinal layer stratum germinativum superficial epidermis fish epithelia mesoderm ganoid placoid ctenoid cycloid ctenoid fish scale ctenoid fish scales cichlid cichlid fish scale cichlid fish scales convict cichlid Chordata Perciformes Actinopterygii cichlid scale cichlid scales body scale body scales

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