Examlex
When a patient recovering from a fractured tibia asks what callus formation is,the nurse tells her it is:
Three-Layered Embryo
Also known as the gastrula, it refers to an early stage in embryonic development where the embryo consists of three primary layers: ectoderm, mesoderm, and endoderm.
Organogenesis
The phase during embryonic development when the ectoderm, endoderm, and mesoderm develop into the internal organs of the organism.
Embryonic Development
The process by which the embryo forms and develops, starting from a single cell and leading to a complex, multi-cellular organism.
Archenteron
The primitive gut formed during early embryonic development in animals, from which the digestive tract eventually develops.
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