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Image #   261050D
Name:   Emu eggshell surface (Dromaius novaehollandiae)
Copyright:   Copyright 2009 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Emu eggshell surface (Dromaius novaehollandiae). Calcium carbonate crystals make up the Emu eggshell. Bird eggshells are semipermeable membranes composed of mineralized calcium carbonate and filled with thousands of pores. The eggshell protects the embryo inside and controls the passage of air in and out of the egg interior through tiny pores. Lying under the eggshell is an anti-bacterial membrane (not shown). This membrane allows the exchange of carbon dioxide and oxygen between the developing embryo and the external environment. Dromaius is a genus of the ""ratite"" bird group present in Australia. A ratite is a diverse group of large, flightless birds of Gondwanan origin, most of them now extinct.
Magnification*: x1,400
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   261050D egg shell egg shell emu emu egg shell emu egg emu bird emu bird egg Dromaius novaehollandiae Dromaius calcium carbonate Gondwanan Gondwanan origin egg surface flightless bird flightless bird egg ratite ratite bird ratite bird group bird birds flightless birds Australia bird blue egg shell calcium egg shell calcium shell cassowary Casuariiformes Casuariidae Dromaiidae ratites aves cassowary egg cassowary egg shell dromaius egg dromaius egg shell ratite egg ratite egg shell calcium eggshell mineralized calcium calcium carbonate crystal blue eggshell semipermeable membrane calcium carbonate egg shell calcium carbonate eggshell calcium eggshell cassowary eggshell dromaius eggshell 03.01.09 SEM emu bird egg shell emu bird eggshell emu eggshell miscellaneous vertebrates ratite eggshell egg shell pore egg shell pores eggshell pore eggshell pores egg shell protection eggshell protection egg shell surface eggshell surface

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