Embryology of the Male Reproductive System I (Easy to Understand)
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- čas přidán 8. 04. 2017
- The development of the male reproductive system explained in a very simple way.
In this video we focus on the embryological development of the testis. In a future video we will discuss development of the external genitalia (both males and females), and the development of the ovaries, and uterus.
CORRECTION @ 13:36: The paramesonephric duct does not become the ovaries. It becomes the uterus and fallopian tubes. Sorry!
If you are completely new to embryology, and you have no idea whats going on, let this be the first video you watch:
→ • Introduction to Embryo...
The development of the kidney and gonads are very closely linked. I recommend you watch the embryology of the kidney video first to get the most out of the above video:
→ • Embryology of the Kidn...
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SUMMARY OF THE VIDEO FOR YOUR NOTES:
Sex differentiation is complex and involves many genes, e.g. Sex differentiating Region on the Y chromosome (SRY). The sex of the embryo is determined genetically at the time of fertilisation, but the gonads aren't either male or female until the 7th week of development. The gonads appear as a pair of longitudinal ridges (the genital or gonadal ridges), which are formed by the proliferation of the epithelium of the underlying mesenchyme (nephrogenic cord). Testis are derived from the intermediate mesoderm, and from germ cells that migrate from the epiblast.
The germ cells appear in the 6th week. They migrate through the primitive streak from the epiblast, by ameboid movement (explained in video) finally reach the gonadal ridge via the dorsal mesentery of the hindgut. if they fail to reach the gonadal ridges, the gonads will not be developed. The underlying mesenchyme proliferates and forms the primitive sex cords and it is impossible to differentiate between male and female at this point (thus the indifferent gonad).
Under the influence of SRY which encodes the testis-determining-factor, the primitive sex cords continue to proliferate and penetrate deep into the medulla to form the testis (or medullary cords). Toward the hilum, the cords break up into a network of cell strands that later give rise to the rete testis. Additional development sees the appearance of the tunica albuginea. Leydig and Sertoli cells are also differentiating at this time.
Leydig cells begin to produce testosterone and the testis is able to influence sexual differentiation of the genital ducts and the external genitalia (penis). Testis cords remain solid until puberty, when they acquire a lumen, thus forming the seminiferous tubules. Once canalised, they join the rete testis tubules which in turn enter the ductus efferentes (efferent ductules). These ductules link the rete testis and the mesonephric duct which becomes the ductus deferens.
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CORRECTION @ 13:36: The paramesonephric duct does not become the ovaries. It becomes the uterus and fallopian tubes. Sorry!
Where is the next video???
Dr. Minass I hope you could release a video about the development of the utter and urethra
Ovary develop from genital ridges
When you switched back to the longitudinal section at 15:00 I literally went "Damn, it makes sense." lol. I've been watching your videos for my embryology tests in med school and they're of great help! Thank you.
You have no idea how much help you've been throughout my embryology block. Thank you SO MUCH for everything that you do and for providing these videos free of charge. Thank you endlessly and I wish you success wherever you are!
Hello there! I've watched all of your embryology videos and I've a test in a couple of hours, they were very helpful! And the quality of your content has improved great job! You're an enthusiastic teacher which always is fantastic❤️
This video is excellent. Explains in detail about the origins of the primary germ cell layers briefly and then the development of the male reproductive system with brilliant illustrations. I have to say better than many of the textbooks out there. Keep up the good work.
OMG, this video is so simple and so easy to understand, just wow , really your method if teaching is impressive
Great video man! Helped a lot. Great balance in the level of details!
These were the best Embryo explanations I've ever had man that shiny bald ingenious head almost brought me to tears
Haha 🤣🤣🤣
Very intelligent way to present difficult things in an easy way
Loved the video. Please make more!
I generally hate embryology because it goes over my head but this was very simple to understand.
amazing and highly helpful, Thnx !
BTW the Gubernaculum does form remnants after birth, which are the Scrotal ligament in males and the Ovarian proper and Round ligaments at females
Thanks Guy. Thats correct, only some of the gubernaculum degenerates. I should have specified!
Oh my goodness thank you so
much for this, didn’t think I’d ever understand!
Thank you for the basic embryology illustration and amazing explanation
bruh you should make more videos. Your videos always, ALWAYS brightens the mood to study embryology!
Very well then Raushen. I have exams at the moment, but your wish will be granted
Aight, goodluck! I'm a first year medical student and I've an embryology test tommorow. So like after watching your overview on it, it was easier for me to read and understand from the embryo books that I have!
Thank God videos on embryology. Very well explained. thank you for making them.
So good and simple! Thank you very much!
Great video, this is the simplest one can get. Just a question, is the mechanism similar in case of animals (particularly SRY and SOX 9) as well? Cheers!
Hey thank you so much for this helpful video! I have a question about the cross-section explained from 12:06. It seems that there are two gonadal ridges with the gut tube somewhat in between. Is that correct? In the drawing of the embryo above it looks like the gonadal ridge is one structure...
Another question: In that cross-section the paranephrogenic duct is more proximal to the gonadal ridges than the mesonephric duct, while in the longitudinal view discussed from 15:00 the paranephrogenic duct is more distal to the gonadal ridges...?? Do they actually shift positions or is it just my confusion about what I'm looking at? I find visualising this (and embryology in general) in 3D really difficult!
Thank you for your dedication, the color coded is really helpful. My lecture note keep me confused, which part origin from meso, ecto, endo.
Thank you so much, your videos are helpful.
Really excellent....completely understood the topic...thanks sir
It would be great if you made more advance embriology videos!
Excelent explaining!
thank you for a detailed video...really need this
May God bless your work 💙💙
Thanks for teaching us in such a simple way!!! Like your vedios and drawing:D
These videos are great!
Wish I saw your videos during my 1st prof . 🙁
You are really awesome . 💪🏻😃👍🏻
You're a wonderful teacher, thank you! 🌟
Thanks Wei
Thank you so much sir really great work...god bless you fr helping us all here
That was not only easy but fun to learn thank you
Thats amazing!
great explanation!! can't wait till the external genitalia one
It's already uploaded!
Great video, very informative!
Could you please make the last diagrams more bigger than the 3 germ layer diagram.. Keep up the good work
Thanks. Sure will do.
You make life so much easier!
Thanks a lot
Cheers Malak!
all your embryology videos are great thank you!!
Glad you like them!
This is so helpfull!! God bless you man! Thankyou
Kerin Victoria you’re welcome! Stay in touch on Facebook or follow on insta for more :)
it's the most simplified...yet most detailed video I had seen on embryology of urinogenital system.
Perhaps there were some points where you went wrong...but I guess a systemic study from Langman's will help me with that.
thanks for making me understand the concept of it so easily sir.
Hey thanks ankita. Where are the errors so I can correct them
@@minass oh actually sir I got to see you had already mentioned them in your comments.
i really like, it so informative. that will simplify book.. while reading. thank you..
really helped me out! thanks for your hard work!
Thanks for watching Lucy
Wishing little more detailing from you sir...
You really explain well and embryology so simple after watching your videos..
More videos on different sections like vascular development and others are needed
Sure I will
great video! thank you!
Hi doctor, thank you very much for your (easy to understand) vedios❤️✨... You make embryology easy to study❤️
-didn't you have a vedio for (development of external genetalia)?
And thank you.
can you tell me about the pbl and what is the best way to study
?
Fantastic videos! Just amazing! Thanks so much!
Great work thank you
great job. and great teacher
ur videos r awsome...waiting for more
I've learned more watching these videos than I learned all semester.
Hey Abigail, thanks for watching ;)
Thank you very much sir! Keep it up
This is fantastic thank you so much!
Nellah Grace thanks Nellah! 😊
Wow, kuroky is actually a doctor! 10/10!
You found my alternate identity 😅
Amazing and really helpful 😍😍
good job (y) yellow color is not a good idea to use on whiteboard ;)
Certainly not
You are a legend! Thank you so much.
you, the true legend, for watching and leaving a comment
you are literally saving our time during exam..😋.. big big Thank you😀...and also waiting for vedio on external genitalia part.
Already uploaded!
very well explained Thankyou very much
You are most welcome
Will you make a video about Embryology of female reproductive system?
I really like your videos
Thank you! This is so useful for embryology
Glad it was helpful!
can you please make a video about the embryology of skeletal muscles and bone, it doesn't matter if it is brief :)
I really Appreciate your lectures of embryo thank you.
but please i need embryology of respiartory,head and neck etc videos
good stuff. thanks
You are the best !!
Συγχαρητήρια και καλή εξέλιξη εύχομαι
your lectures are the best...i really appreciate your concern for us
really amazing and helpful..thnk alottt
can u plzz find some time for part 2...!!!1?
Already uploaded
Sir your video on male reproductive system is good. Sir but I didn't understand what is the source of germ cells, i.e., either from ectoderm, endoderm or mesoderm?
You, sir, are awesome.
hi man this vidoe is great! can you please find some time for part 2 ?? embryo fnal in 2 weeks!
thanks !!
watching for my exam in few hours.
thank u
This video was made for times like this haha. Good luck
Yours are the most helpful videos ever.. Thanks a lot sir.. Would you please do one for pharyngeal arches development..! 😊😊
would also love one on the pharyngeal arches
Ok then guys, I'll make one on the pharyngeal arches soon.
Key Kinnari, I have just uploaded a pharyngeal arches video :)
I ll watch all your embryology vdos...dey r fantabulous
Where does the Mullerian/Paramesonephric duct develop from? Wolfian comes from mesonephric but where does the mullerian come from?
wish u have exposed some more details but still it s good
Sir please upload videos on female reproductive system and external genitalia. Ur vedios a very much simplified and understandable
Paresh Dalei ok!
helpful lecture
thanks for this video
Great video !
Thanks!
Thanks sir. God Bless u
thank you for this video, it was really helpful. could you maybe create on for the femaile genitalia including its external formation.
Seconded
Will do!
Thank you so much😊
it was very helpful.... but where is the next vedio
Thank you so much Sir 🤗🥰
Very welcome
Thanks!!
Arent the germ cells coming from the yolk sack? Why epiblast not endoderm?
nic e video ..helps to understand easily
binal joshi thank you 🙂
thank you ....... we love you from algeria
Love back from Australia!
Thanks sooo much 💚
Amazing ❤️🙏
Amazing!!
You are!
Wonderful, useful and easily to understand, thanks a looooot~~~~subscribed!!!
But plz do an new film on female reproductive system~~~plz~~~
flora lin I’ll make that video next. Thanks for watching Flora 😎
thankyou so much Sire 👍🏻👍🏻👍🏻
part 2 please
You have a new subscriber! (:
Ambient Kitty thanks 😊
Thank you so much🤩🤩
Any time!
Please also make a video on the embryology of external genitalia and accessory sex glands.
It will be done
SO GOOD
Amazing...
Matchless sir ,
Thanks
awesome videos, may I inquire about why you stopped making new videos?
I'm keen on making more videos! Next one is embryology of the heart 2 (septation, valves)
Thank you 🙏
You’re welcome 😊
Good work Minass
Thank you sir
Yes Sir it is very nice