The term egg , which comes from the Latin word ovum, refers to a rounded element produced by females of various species that shelter the germ of a embryo and stores substances that nourish it within the framework of incubation.
The hardness and size of the egg depend on the type of animal . This structure arises when the egg fertilization and the embryo must be protected and receive nutrients. The birds and numerous reptiles , amphibians , fishes , arachnids and insects They reproduce in this way.
The eggs have a shell or shell which is the first layer of protection. Inside are the clear (formed by proteins and water) and the bud (which contains vitelo - the cytoplasmic sector of the zygote that has lipids, carbohydrates and other nutrients - and the germ disc). The white is the white part of the inside of the egg; The yolk, the yellow portion.
Most animals usually hatch or incubate the eggs giving them hot . Within the framework of this process, the zygote develops. When the embryo reaches the necessary development, the egg hatches : the shell is broken and the specimen is born.
It should be noted that the eggs of the birds constitute a food very important for him human being . The most consumed are the chicken eggs , although the quail eggs , the goose eggs and the duck eggs .
Eggs can be eaten in multiple ways: fried, scrambled, boiled, etc. They are also used to prepare tortillas , biscuits, mayonnaise and many other products.
Beyond this usual meaning of the notion, the idea of egg can also refer to a zygote , a Ovum or a testicle , according to the context.