Embryogeny (/ɛmbrʌɪˈɒdʒɛni/) is derived from the Greek words "embryo" and "geneia", which literally means the formation or generation of an embryo. The word is frequently used in developmental biology, referring to the processes that occur during embryo development. The spelling of Embryogeny follows the English orthography rules, where "embryo" is spelled with an "e," and "geny" with a "g." The IPA phonetic transcription (/ɛmbrʌɪˈɒdʒɛni/) helps to clarify the pronunciation of this word for those who may not be familiar with it.
Embryogeny refers to the process of embryonic development in organisms, particularly in animals and plants. It involves the series of steps and transformations that a fertilized egg (zygote) undergoes in order to develop into a fully formed and functional embryo. The term is derived from the Greek words "embryon" meaning "embryo" and "genes" meaning "origin" or "birth".
In animals, embryogeny starts with the fusion of male and female gametes, resulting in the formation of a single-celled zygote. Through subsequent cell divisions, the zygote develops into a multicellular structure called a blastocyst. This blastocyst goes through further cell differentiation and morphogenesis, resulting in the development of germ layers, organs, and body structures. Eventually, the embryo takes a recognizable form of the specific species.
In plants, embryogeny begins with the fertilization of the egg by sperm. This results in the formation of a zygote, from which an embryo develops within the seed. The embryo then undergoes different stages, including the formation of cotyledons, shoot apical meristems, and root apical meristems. These structures eventually give rise to the leaves, stems, and roots of the mature plant.
Overall, embryogeny is a crucial process in the life cycle of organisms. It is responsible for the formation of new individuals and the transmission of genetic material from one generation to the next.
The origin and growth of the embryo.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
In bot., the development of the embryo in the ovule.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "embryogeny" is derived from two Greek words: "embryon" (ἔμβρυον), meaning "embryo", and "genes" (γένεσις), meaning "origin" or "generation". The combination of these two words forms "embryogeny", which refers to the development or generation of an embryo.