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An embryo is the initial stage of development for a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell. The resulting fusion of these two cells produces a single-celled zygote that undergoes many cell ...
Learn the meaning of embryo as a noun and a combining form, with examples of usage and word history. Find out how embryo relates to animal development, seed plants, and legal issues.
May 10, 2024 · Learn about the embryo, the early stage of animal development from fertilization to differentiation. Explore the history of embryology, the study of embryo formation and development, from Aristotle to modern times.
- The Editors of Encyclopaedia Britannica
Aug 13, 2023 · Embryo Definition. In Biology, an embryo is designated as the initial phase of development for a multicellular organism arising after the fusion of a sperm cell (male sex gamete) and an egg cell (female sex gamete released during a woman’s reproductive cycle) during the process of fertilization. This fusion gives rise to a zygote (which is ...
Embryo vs. fetus. In human pregnancies, a baby-to-be isn’t considered a fetus until the 9th week after conception, or week 11 after your last menstrual period (LMP). The embryonic period is all ...
Jul 6, 2017 · Learn about the early developmental stage of eukaryotic organisms after fertilization, from cleavage to organogenesis. Test your knowledge with a quiz on embryo formation and structure in animals and plants.
Embryology is the study of how embryos and fetuses form and develop. Learn about the history, pioneers, and principles of embryology, from Aristotle to Roux, from epigenesis to induction.
