Linked from

The 13 pages that link to Eggshell, each with the reason it gives.

• OviparityRelated: Its structure limits water loss while allowing gas exchange in many terrestrial eggs.

• PlacentaCompared with: An eggshell supports embryo exchange with the environment rather than through a maternal organ.

• Amniotic eggRelated: It limits water loss while allowing respiratory gases to pass.

• IncubationRelated: The shell limits water loss while permitting gas exchange during incubation.

• Ground-nesting birdRelated: Shell properties must protect eggs during incubation without preventing the developing embryo from exchanging gases.

• Eggs as foodBroader topic: Its pores permit gas exchange, while the shell protects the contents before cracking.

• YolkRelated: The shell encloses the yolk and other contents while allowing gas exchange.

• Elephant birdRelated: Elephant bird eggshell fragments preserve evidence used to study diet, dating, and human interaction.

• Great aukRelated: The great auk laid a single large egg, which collectors prized and colonies could not readily replace.

• Poached eggCompared with: Poaching removes this shell before cooking, unlike boiling an egg intact.

• Boiled eggBroader topic: It keeps the egg intact in water while allowing heat to pass inward.

• Leghorn chickenRelated: Leghorn hens characteristically lay eggs with white shells.

• Animal shellCompared with: It encloses offspring rather than covering the animal’s adult body.