In the Week 2, we had a bilaminar germ disc with 2 cavities (amniotic cavity and yolk sac) suspended in the chorionic (extraembryonic cavity) by…
Explore more Embryology Week 3: Trimalinar Germ DiscMonth: August 2016
Embryology Week 2: Rule of Twos
Starting from Day 8, blastocyst progressively invades into the endometrial stroma and there is formation of: 2 layers in Trophoblast: 1. Inner mononulcear Cytotrophoblast (Cellular)…
Explore more Embryology Week 2: Rule of TwosEmbryology Week 1: Cleavage to Implantation
Following events occur in the zygote formed in the week zero of development: Cleavage Approximately 24 hours after fertilization the zygote begins with the first…
Explore more Embryology Week 1: Cleavage to ImplantationEmbryology Week 0: Gametogenesis, Ovulation and Fertilization
Gametogenesis – formation of gametes from primitive germ cells Spermatogenesis, begins at puberty and occurs in seminiferous tubules (spermiogenesis occurs in sertoli cells). One spermatogenesis takes an…
Explore more Embryology Week 0: Gametogenesis, Ovulation and FertilizationDural Reflections and Venous Sinuses
Dura mater (pachymenix) is the outer meningeal layer consisting of: Dural Reflections These are the infoldings formed by the inner meningeal layer reflecting away from…
Explore more Dural Reflections and Venous SinusesCircle of Willis and Forebrain Blood Supply
We have already discussed earlier on the intracranial course of Internal Carotid Artery (ICA) and Circle of Willis formation with the help of a simple…
Explore more Circle of Willis and Forebrain Blood SupplyCircle of Willis – Mnemonic and Drawing
Circle of Willis is an important arterial communication that supplies the forebrain (telencephalon, diencephalon and optic vesicle) and often frequently tested in the exams. Circle…
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