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Image #   29826B
Name:   Chicken eggshell cross section
Copyright:   Copyright 2009 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Chicken eggshell cross section. Shown from left to right in the image - hard mineralized eggshell, internal fibrous membrane and smooth inner surface of the internal membrane. The hard mineralized eggshell contains calcium carbonate (CaCO3) mineral crystals that form many tiny pores in the eggshell. The eggshell internal fibrous membrane is composed of protein fibers (internal and attached to the hard eggshell). The inner surface or the internal fibrous membrane is smooth. Several membranes are found around the embryo of a bird egg. The internal eggshell membrane adheres to the inner surface of the hard eggshell. As the chick develops changes in the eggshell allow the passage of carbon dioxide and oxygen and the release of water vapor by way of the eggshell membranes. Eggshells are the outer covering of hard-shelled eggs and of other eggs with soft outer coats. Eggshell structure varies widely among species. Birds and some reptiles produce hard-shelled eggs. Bird eggshells are composed of a protein matrix lined with mineral crystals, usually calcium carbonate. Most of the eggshell is composed of calcium carbonate crystals (approximately 95%). In the formation of the mineralized eggshell tiny pores develop for additional gas exchange.
Magnification*: x80
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   29826B chicken egg shell inner membrane chicken eggshell inner membrane egg shell inner membrane eggshell inner membrane inner membrane protein membrane protein membrane fibers egg shell fibrous inner membrane eggshell fibrous inner membrane fibrous inner membrane fibrous membrane 08.01.09 chicken egg chicken egg shell chicken egg shell surface egg shell egg shell surface eggshell misc. vertebrate misc. vertebrates vertebrate vertebrates chicken eggshell chicken eggshell surface eggshell surface egg shell pore egg shell pores eggshell pore eggshell pores calcium carbonate crystal egg shell crystal eggshell crystal lattice CaCO3 calcium carbon dioxide carbon dioxide exhange oxygen oxygen exchange calcium carbonate compound calcium carbonate mineral calcium mineral calcium minerals mineral mineral crystal mineral crystals SEM calcium carbonate crystal calcium carbonate crystals hard shelled egg hard shelled eggs hard-shelled egg hard-shelled eggs calcified calcified egg calcified egg shell calcified eggs calcified egg shells calcified eggshell calcified eggshells bird egg bird egg shell bird egg shells bird eggs bird eggshell bird eggshells chicken hen egg food foods foodstuffs

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