embryo
the developing human organism from about two weeks after fertilization through the second month ○ Outer cells of zygote become placenta ○ Over 6 weeks, embryo’s organs begin to form and function, the heart begins to beat ○ By the end ears begin to take shape & will move its head
The embryo is the earliest developmental stage of a multi-cellular organism. It is formed after the fertilization of an egg by a sperm. The fertilized egg goes through a series of mitotic cell divisions, forming a cluster of cells that eventually become organized into a structure known as the blastocyst. The blastocyst has an outer layer called the trophoblast and an inner cell mass that will develop into the embryo.
As the embryo develops, cells differentiate and form specialized tissues and organs. The process of embryonic development is controlled by genetic and environmental factors, and any disruptions or abnormalities during this process can result in congenital and developmental disorders.
The study of embryonic development is important in fields such as embryology, developmental biology, and reproductive medicine as it provides insights into how organisms grow and develop, and offers potential avenues for treating developmental disorders.
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