Chorionic Villi | Placenta development | Nursing Lecture

Chorionic villi are the functional unit of the placenta which lies in between the basal plate or chorionic plate. In this video, it is explained how the placenta is developing.
After the interstitial implantation, the outer syncytiotrophoblastic cells spread, and soon the spaces develop in between the cells that are called lacunae, and the syncytium cells erode the maternal capillaries too and drain maternal blood into the lacunae that eventually develops into the intervillous spaces. The syncytiotrophoblastic cells in finger-like projection and the lacunae in between them arrange in a cord-like fashion is called trabeculae.
Meanwhile, the embryoblastic cells form a bilaminar embryonic disc, one with the epiblastic layer forms an amniotic cavity and another with the hypoblastic layer forms the primary yolk sac. The yolk sac gives rise to the extra-embryonic mesoderm all around the embryoblast in between the embryoblast and cytotrophoblast. Soon few cells disintegrate to form a cavity within this mesoderm the extra-embryonic coelom.
On day 13 some of the cytotrophoblastic cells go into the finger-like projections of trabeculae and forms primary villi and when the mesodermal cell goes into these villi the called secondary villi by day 16 and these mesodermal cells start differentiating and forms blood vessels and cells within these finger-like projection called the tertiary villi by day 21. Meanwhile, some of the cytotrophoblastic cells in these villi penetrate the outer syncytiotrophoblastic cells and arrange transversely by covering the syncytium layer form the cytotrophoblastic shell.
The villi formation is taken place all around the blastocyst but the villi which are forming around the decidua capsularis becomes degenerated with the growing embryo and change to become the chorionic leave and forms the outer fetal membrane the is the chorion that is limited at the edge of the placenta. The epiblastic cells form the inner fetal membrane amnion.
Few mesodermal cells attach with the caudal end of embryo to the cytotrophoblastic layer are not taking part in the formation of the coelom forms connecting band or body stalk and becomes the umbilical cord later on.
The previous parts on the placenta development are available here:
Part-1 Implantation - • Implantation | Placent...
Part-2 Decidua - • Decidua | Placenta Dev...
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#ChorionicVilli #placenta #HumanReproduction #Nursing #nursinglecture

[@NursingLecture]

*Check its Hindi (हिंदी) version here:* czcams.com/video/aud0p3dvp-8/video.html

[@maheshahir7857]

Great 👏 video to understand each & everything..👏

[@samuzzalpratim7820]

Awesome video maam , found this video and it cleared my all doubt . Thank you soo much ma'am ❤️

[@badri97]

Very nice explanation mam🙏😍😊

[@vedantsrivastava3823]

You taught really well.... Thanks.

[@NursingLecture]

Most welcome 🙏 🤗

[@rupalishirsath363]

Mam the explanation was too good but figures must be more zoom in.... Plzzzz

[@mondiraghosh6392]

Thanks a lot😊...

[@NursingLecture]

Most welcome 😊

[@user-pf6kf7lz3g]

Very nice 💯🙂

[@NursingLecture]

Thanks Nosheen 🙏😊

[@sanachouhan6170]

Very nice explanation maam🙏🙏

[@NursingLecture]

Thank you

[@Aju_jaanu]

Mam the best 🎉❤

[@NursingLecture]

Thanks 😌😌

[@sayantibhattacharjee2030]

Amazing ❣️

[@NursingLecture]

Thank you ♥️🙏

[@bilalhaider3439]

Thanks alot....it helps me alot.

[@NursingLecture]

Thank you 😊

[@sujatakumari8052]

You explained very well 👌👌

[@farheenanaaz1990]

Decidua is seen fundo posterior wall my pregnancy is of 11weeks3days is it placenta? Plz help sister

[@shreyaputatunda3817]

Ma'am kindly make a video on gastrulation🙏

[@NursingLecture]

Will try

[@manasams2547]

Thank u so much mam😊

[@chikusharma7005]

Thank you mam 👍

[@pujaranisahu988]

Whenever I'm trying to get attention to a point one add must came so too much add, facing problem

[@mustafeejan3153]

Thank you mam🙏🏻

[@stephinabraham1117]

Thank you so much.... U cleared so many doubts that i had.. ❤

[@NursingLecture]

My pleasure 😊 Glad to hear that

[@omna6662]

managment of 3rd stage of labor

[@omna6662]

hindi me bnao mam 3rd stage of labor managmen

[@nursingfunda7649]

Thank you mam...
But in one diagram you list out all things I got confused

[@snehalatasahu3357]

Amazing video.But please add subtitles mam

[@vanikajoon108]

Mam so many videos are shown private in your channel
Please make them public

[@pritikhatri5069]

Mam mesoderm cells extraembryonic cavity me kha se or kse aai.

[@bhuvaneshwariravi9501]

Please help me to differ villous, interstitial extra villous, intravascular extra villous cytotrophoblast 🙏

[@randaltahhan3844]

You are so cute, I love your lesson

[@NursingLecture]

Thank you! 😃 🙏

[@Sharmistha99]

Thanks a lot madam 🙏🙏🙏🙏🙏

[@Sask339]

One doubt ma'am
How do the extraembryonic mesodermal linings develop into capillaries

[@26jagriti21]

Mesoderm forms blood vessel

[@osadebaenoba9831]

Please there is no English version of skeleton

[@snehalatasahu3357]

Please add subtitles

[@osadebaenoba9831]

Please there is no English version of skeleton