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eggclick to hear

Reproductive method of certain animal species: a living cell with a casing and a food reserve, produced by the female.
egg albumen chalaza yolk air space vitelline membrane shell membrane shell blastodisc

albumen click to hear

Viscous liquid substance, popularly known as white of egg, surrounding the yolk and containing water and the proteins the embryo requires.

chalaza click to hear

Spiral filament of albumen maintaining the yolk in the center of the egg.

yolk click to hear

The embryo’s food reserve located in the center of the egg.

air space click to hear

Pocket of air contained between the two layers of the shell membrane at the base of the egg; it forms once the egg has cooled after being laid.

vitelline membrane click to hear

Thin flexible transparent tissue enveloping the yolk.

shell membrane click to hear

Flexible porous tissue made of two superimposed layers covering the inside of the shell; it contributes to respiration and fights bacteria.

shell click to hear

Hard porous calcareous casing of the egg; it provides protection, fights bacteria and helps respiration.

blastodisc click to hear

Evidence of fertilization of the egg on the surface of the vitelline membrane; the embryo grows from it.