Notes in 03EmbryonicPeriod

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Published 07/30/2024 The neural plate will be induced with upregulation of {{c1::fibroblast growth factor (FGF)}}; andinhibition of {{c1::bone morphogenetic protein 4 (BMP…
Published 07/30/2024 7347807c24a947ac89ee44542d43ca9e-oa-1
Published 07/30/2024 7347807c24a947ac89ee44542d43ca9e-oa-2
Published 07/30/2024 7347807c24a947ac89ee44542d43ca9e-oa-3
Published 07/30/2024 Fusion of the neural folds begins in the {{c1::cervical region (5th somite)}}
Published 07/30/2024 As the neural plate lengthens, its lateral edges elevate to form {{c1::neural folds}}, and the depressed midregion forms the {{c1::neural groove}}
Published 07/30/2024 The cephalic and caudal ends of the neural tube communicates w/ the amniotic cavity by way of the {{c1::anterior (cranial) and posterior (caudal) neur…
Published 07/30/2024 The anterior neuropore closes at day {{c1::24}}
Published 07/30/2024 The posterior neuropore closes at day {{c1::26}}
Published 07/30/2024 Complete closure of the neural tube occurs at day {{c1::28}}
Published 07/30/2024 Neural Crest Cell Migration Pathways and Fates{{c1::Dorsal}} Pathway through {{c1::holes in the basal lamina}}{{c1::Ventral}} Pathway through {{c1::th…
Published 07/30/2024 By the time the neural tube is closed, two bilateral ectodermal thickenings, {{c1::the otic placodes and the lens placodes}}, become visible in the ce…
Published 07/30/2024 lens {{c1::placode}} → lenses
Published 07/30/2024 Blood vessels form in two ways:{{c1::vasculogenesisangiogenesis}}
Published 07/30/2024 The definitive hematopoietic stem cells are derived from mesoderm surrounding the aorta in a site near the developing mesonephric kidney called the {{…
Published 07/30/2024 The definitive hematopoietic stem cells from the AGM colonize the liver and form blood for the {{c1::2nd - 7th}} months
Published 07/30/2024 {{c1::Capillary hemangiomas}} - Abnormally dense collections of capillary blood vessels that form the most common tumors of infancy
Published 07/30/2024 The embryonic GIT is divided into three regions:{{c1::Foregut, Midgut, Hindgut}}
Published 07/30/2024 The {{c1::midgut}} communicates with the yolk sac by way of a broad stalk, the {{c2::Vitelline (yolk sac) duct}}
Published 07/30/2024 the {{c1::fore}}gut is temporarily bounded by the {{c3::oropharyngeal membrane}} that separates the {{c2::stomodeum}}The hindgut also terminates at&nb…
Published 07/30/2024 The result of cephalocaudal growth and lateral folding is partial incorporation of the allantois into the body of the embryo, where it forms the {{c1:…
Published 07/30/2024 Because counting somites becomes difficult during the 2nd month, the age of the embryo is then indicated as the {{c1::crown-rump length (CRL) and expr…
Published 07/30/2024 At the end of the fourth week, when the embryo has approximately {{c2::28}} somites, the main external features are the {{c1::somites and pharyngeal a…
Published 07/30/2024 {{c1::Rays}} - radial grooves separating five slightly thicker areas appear on the distal portion of the buds, foreshadowing formation of the digits
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