Concept in Definition ABC

At the behest of the biology development, is designated as ontogeny to conformation and development of the person, especially in the embryonic stage.

Thanks to ontogeny, then, we can know in depth how is the development of an organism, that is, from the moment in which the ovum is fertilized by the sperm, passing through its adult stage and until its aging.

It should be noted that this development has two important functions, on the one hand, the generation of diversitymobile, organizing the different types of cells in tissues and organs, and on the other hand ensuring the continuation of life from generation to generation.

Ontogeny, also called morphogenesis or ontogenesis It is divided into different phases such as: fertilization (In fertilization, the union of the two gametes occurs with the relevant conformation of the egg or zygote; It is worth noting that the gametes can be the same or different), activation (In this phase a series of phenomena will take place in the conformed zygote and which are the ones that will end up causing it to begin to segment by mitosis) and

embryogenesis (This is the name of the set of processes that comprise the moment from which the zygote begins to fragment and until organogenesis actually occurs).

Within embryogenesis there will be several phases that we will list below: segmentation (In this the zygote will be divided into numerous smaller cells known as blastomeres), blastulation (the training of the blastula: the body already has more than 64 cells, being his appearance similar to that of a spherical body), gastrulation (From the blastula stage, germinative leaves take place in this phase: ectoderm and endoderm; the former produces the cells of the epidermis and from nervous system and the second produces the cells that cover the digestive tract as well as the associated organs; and the mesoderm, the third leaf that forms in metazoans, promotes the formation of organs such as the heart, kidneys, including connective and supporting tissues and blood cells) and organogenesis (implies the interaction and movements leading to the formation of organs).

Topics in Ontogeny