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English: Diagram of a chicken egg: . Eggshell; Outer membrane; Inner membrane; Chalaza; Exterior albumen (outer thin albumen) Middle albumen (inner thick albumen) Vitelline membrane
Normally the egg is incubated outside the body. However, in one recorded case, the egg incubation occurred entirely within a chicken. The chick hatched inside and emerged from its mother without the shell, leading to internal wounds that killed the mother hen. [8] Embryo development remains suspended until the onset of incubation.
The incubator is recorded being used to hatch bird and reptile eggs. It lets the fetus inside the egg grow without the mother needing to be present to provide the warmth. Chicken eggs are recorded to hatch after about 21 days, but other species of birds can take a longer or shorter amount of time. [10] Incubators are also used to raise birds. [11]
Although using old processing methods, they were considered effective at hatching chickens, especially in comparison to other techniques of the time. [3] Egyptian egg ovens are typically brick structures, often created from mud. [2] In Egypt, the ovens varied in size depending on the area served, with the largest having a capacity of 80,000 ...
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A popular Easter tradition in some parts of the world is the decoration of hard-boiled eggs (usually by dyeing, but often by hand-painting or spray-painting). Adults often hide the eggs for children to find, an activity known as an Easter egg hunt. A similar tradition of egg painting exists in areas of the world influenced by the culture of Persia.
Incubators are essential for much experimental work in cell biology, microbiology and molecular biology and are used to culture both bacterial and eukaryotic cells. An incubator is made up of a chamber with a regulated temperature. Some incubators also regulate humidity, gas composition, or ventilation within that chamber.
Incubator (culture), a device used to grow and maintain microbiological cultures or cell cultures; Incubator (egg), a device for maintaining the eggs of birds or reptiles to allow them to hatch; Incubator (neonatal), a device used to care for premature babies in a neonatal intensive-care unit