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an animal that is developing either in its mother's womb or in an egg, or a plant that is developing in a seed: Between the eighth week of development and birth a human embryo is called a foetus. in embryo formal. developing and not yet complete: The department's plans for enlargement are still in embryo. See more.
The embryonic period varies from species to species. In human development, the term fetus is used instead of embryo after the ninth week after conception, [19] whereas in zebrafish, embryonic development is considered finished when a bone called the cleithrum becomes visible. [20]
an animal that is developing either in its mother's womb or in an egg, or a plant that is developing in a seed: Between the eighth week of development and birth a human embryo is called a fetus. in embryo formal. developing and not yet complete: The department's plans for enlargement are still in embryo. See more.
EMBRYO definition: a human or an animal that is starting to develop in its mother's uterus. Learn more.
Apr 12, 2023 · The embryonic period is all about the formation of important systems of the body. Think of it as your baby’s basic foundation and framework. The fetal period, on the other hand, is more about...
Jul 6, 2017 · An embryo refers to the early developmental stage of eukaryotic organisms following the fertilization of an egg (derived from a female) by sperm (derived from a male) as a method of sexual reproduction.
Aug 13, 2023 · An embryo refers to the early developmental stage of a multicellular organism that follows fertilization. This stage represents a crucial juncture in the life cycle, transitioning from a single fertilized cell into a complex organism with specialized tissues and structures.
: an animal in the early stages of growth and differentiation that are characterized by cleavage, the laying down of fundamental tissues, and the formation of primitive organs and organ systems. especially : the developing human individual from the time of implantation to the end of the eighth week after conception. b.
May 9, 2024 · Embryo, the early developmental stage of an animal while it is in the egg or within the uterus of the mother. In humans the term is applied to the unborn child until the end of the seventh week following conception; from the eighth week the unborn child is called a fetus.
v. t. e. Human embryonic development or human embryogenesis is the development and formation of the human embryo. It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development.
