Notes in Embryology

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Published	09/14/2023	sperm penetrates the {{c1::corona radiata}} of the ovary, releasing {{c2::acrosin}} which allows the sperm to enter the egg
Published	09/14/2023	{{c2::Zona reaction}}: {{c1::Cortical granules}} are released that prevents further sperm penetration.
Published	09/14/2023	Zygote divides into a {{c1::blastocyst}} which is made of two different types of cells {{c1::trophoblasts and embyoblasts}}
Published	09/14/2023	Blastocyst implants into the {{c1::uterine cavity}} (day 7)
Published	09/14/2023	Trophoblast differentiates into {{c1::1. Cytotrophoblasts}} and {{c1::2. Syncytiotrophoblasts}}
Published	09/14/2023	Embryoblast differentiate into {{c2::1. Hypoblasts}} and {{c1::2. Epiblasts }}
Published	09/14/2023	{{c2::Amniotic}} cavity and {{c1::Chorionic}} cavity forms during Week 2 of twos
Published	09/14/2023	Extraembryonic mesoderm splits into two: {{c1::1. Extraembryonic somatic mesoderm}} and {{c1::2. Extraembryonic splanchnic mesoderm}}
Published	09/14/2023	Gastulation steps: 1. Epiblasts invaginate (creating primitve streak) and replace the {{c1::hypoblasts }}2. {{c1::Mesoderm}} forms creating …
Published	09/14/2023	Notochord is transient, secretes {{c1::SHH}}, becomes the nucleaus pulposus which provides {{c1::cushioning between interveterbral discs}}
Published	09/14/2023	Paraxial mesoderm ==> Somites ==> {{c1::Dermatome}}, {{c1::Myotome}}, {{c1::Scleratome }}Dermatome of Paraxial Mesoderm = {{c2::Dermis laye…
Published	09/14/2023	Intermediate mesoderm = {{c1::urology-genital structures}}. Examples are {{c2::ovaries, testes, kidneys, adrenal cortex, urethrea, bladder, etc.}}
Published	09/14/2023	{{c1::Lateral Mesoderm}} ==> Somatic/Parietal (dorsal side), Intraembryonic Coelom, Splanchnic/Visceral (ventral side)
Published	09/14/2023	Neurlation creates {{c2::Neural Tube AND Neural Crest Cells}}, and {{c1::Ectoderm}} formation happens at around the same time
Published	09/14/2023	Lateral Mesoderm components:{{c2::Somatic/Parietal of Lateral}} = parietal pleura (outside lining of lungs), dermis?, bones and connective tissue of l…
Published	09/14/2023	Neural Tube forms the {{c1::Brain and Spinal Cord (CNS)}}Neural Crest Cells form the {{c1::PNS, Sympathetic neurons, Schwann cells}}, {{c2::…
Published	09/14/2023	Ectoderm forms the {{c1::epidermis, lens and retina, epithelial lining of oral cavity}}, {{c2::sensory regions of ear, Lower ⅓ of anal cavity,&nb…
Published	09/14/2023	Endoderm fold laterally to create the gut tube = foregut, midgut, hindgut (Day 28-50)Foregut = {{c1::mouth, esophagus, lungs, pancreas, liver, stomach…
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