What is Fertilization, Gastrulation and Neurulation - Overview

Fertilization is a process of fusion between male sperm and female oocyte. it takes place within the Fallopian tube of a female reproductive system. As soon as the nuclei of the oocyte and sperm fuses with each other a zygote is formed. The zygote undergoes a series of cell divisional stages and turns in to a 2 cell then 4 and then 8 cell mass. Through continued cell division the zygote turns into a morulla, blastula and then blastocyst. The blastocyst contains two types of cells, the embryoblast and trophoblast. The embryoblast will become the future baby and the trophoblast will form the supporting tissues of the baby. The blastocyst will implant in the uterine wall and this implanted blastocyst is now called the embryo.
The embryoblast of the blastocyst will convert into two layers of cells called the epiblast and the hypoblast. These two layers together is called the bilaminar disc. The bilaminar disc will convet into a trilamilar disc by forming an additional layer in-between the epiblast and hypoblast. This third layer originates from the epiblastic layer. The three germ layers now formed together is called a trilaminar disc. The trilaminar disc is composed of the ectoderm, mesoderm and endoderm.The trilaminar disc will fold rostrocranially and laterally .
Neuralation or neural tube formation originates from the superficial layer of the ectoderm. Under the influence of the underlying notochord a longitudinal thickening appears on the ectodermal layer just above the notochord forming the neural plate. The central area of the neural plate depresses downwards while its sides raising upwards , the central depressed point is called the neural groove while the raised sides are called the neural folds. The neural folds grows towards each other until they meet and forms the neural tube. Some cells will detach from the neural tube during neurulation process called the neural crest cells.
Video (diagrams+editing) & Voiceover:
Dr.Maryam Kazman
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#fertilizaton #implantation #neurulation #blastula #blastocyst #embryogenesis #trophoblast #epiblast #hypoblast #bilaminardisc #ectoderm #notochord #mesoderm #endoderm #trilaminardisc #gastrulation #neurulation #neuraltubeformation #neuralcrestcells #zygote #morulla

[@mehreenshowkat2182]

You explained many vital concepts of embryology in just a short single video and yet so clearly. Highly appreciated. Please continue ur video series. Love your videos and love you❤❤

[@DentalManiaK]

Thank you so much for such a lovely feedback 🥰
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[@mahmudaakter2418]

So easy & beautiful presentation! Thank you🌹🌹🌹

[@evitafernandes7994]

Excellent explanation please make a video on the more detailed version of the same just great way of teaching 🙂

[@DentalManiaK]

Thanks a lot for the feedback 🥰🙏
Please consider sharing the channel

[@arbazpatel5949]

Please keep making videos for MBBS.

[@Sahil-en9uv]

Wow...its really helpful...please continue your video series👍👍

[@HimanshuKumar-tf2ou]

This was awesome video for mbbs too , plz make more videos

[@DentalManiaK]

Sure :)

[@balambalmk2935]

Actually I watched several vedios before this one.....but this one was so clear . Thank you so much❤️

[@DentalManiaK]

Thankyou so much for the feedback 🥰

[@vakuldunga2278]

Very very well explained and very colourful....n this is the easy way to learn n remember embryology 🙏🙏🙏🙏

[@DentalManiaK]

Thankyou for the feedback 🙏🙂

[@salarkhanwazir]

amazing and quick lecture.....thank you

[@krsna6394]

Just wow thank you very much ma'am I don't have words to express my gratitude towards you ..💐💐💐

[@DentalManiaK]

Thanks for the feedback:)

[@emily8664]

Excellent! Thank you very much for helping with my studies

[@محمدالأيوب-م1د]

very good

[@hiader0]

Astonishing work.

[@DentalManiaK]

Thanks :)

[@TheBlissfulRelaxation]

Good explanation, Great Drawing.Thanks for the video.

[@shilpanatesan5966]

Very nice representation...

[@tatetrujillo]

Amazing!!! Great job.

[@yenibera.priscillaJCD]

Thank you mam 😊

[@beyondyou9017]

You are life saver 🙂

[@DentalManiaK]

Hahah, thanks :)

[@equityeyewear1987]

Amazing video

[@DentalManiaK]

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[@mohammedismailkhan5903]

Excellent representation 🔥

[@DentalManiaK]

Thanks 🥰

[@tamjidarafat9577]

Thanks a lot

[@ArundhotiRay]

very helpful!

[@drshahidkhan7137]

My second Question is How many oocytes are available at the time of puberty?

[@safahameed2482]

very helpful! thanks :)

[@aroshbanaeem9918]

Marvelous representation

[@drshahidkhan7137]

After a sperm has penetrated an ovum in the process of fertilization, entry of further sperms is prevented by?

[@2-7-2-7]

Thanks a lot 🙏🙏♥️♥️

[@DentalManiaK]

My pleasure ❤️

[@aunghtwe93]

Thz u

[@hjxjj123]

💚✌🇮🇳