Reproductive System | Fertilization
ฝัง
- เผยแพร่เมื่อ 10 พ.ค. 2017
- Official Ninja Nerd Website: ninjanerd.org
Ninja Nerds!
During this lecture Professor Zach Murphy will be discussing Fertilization. We will also be outlining the reproductive system anatomy and physiology. We hope you enjoy this lecture and be sure to support us below!
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Sir, you are the best ever, sir please don't stop uploading videos, we all Nigerian medical students are impressed to have you, you are a blessing to all medical students of the world, please keep uploading much of embryology videos, like, respiratory, urogenital,cardiovascular, nervous integumentary ,and musculoskeletal system development, embryology of ear, eye, head and neck embryology, and finally birth defects and signaling pathways and molecules, like wnt, hedgehog, fgfs etc
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I'm in my 6th year of medical school now. I am watching this to refresh my memory and I just can't help it but smile at how much I used to watch your videos back in the day.
Thank you bro ❤
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9
@@mariaaguilar9622 ajwal kya hai
כן אהה הוא אחד מ הטובים
Honestly, you are the best educator I have ever seen in my life. Keep the good job and I wish you all the best in your life.
I've watched dozens of fertilization discussion. This is by far the most thorough. It helped me digest all the other information. Thank you, thank you.
9:24 Changes in sperm for fertilization
1) *Capacitation*
-Cleans head
-Increases motility
2) *Acrosomal reaction*
3) *Fast block to polyspermy*
4) *Slow block to polyspermy*
didn't attend embryology class this semester, now im getting more knowledge of the course than i would have from my professor, your are truly a hero. Big thanks from Morocco.
you’re
you
God I hope my professors explained like this in their lectures. Your videos save my ass once again 😂
this is the best embryology lecture I have ever seen. Sir, the lecture was too good with all the details of enzymes and differernt secretions.My concepts are crystal clear after watching your video. Thanks!
I have to pay 1.800 dollars for attending the med school per semester, and here i just got lectures for free...
Thanks a lot zach and team, i love you guys, god bless you all👍
I love how you add a lot of details and still make everything really understandable, thanks :)
+Victoire We try! Thanks for watching!
That’s how great and technical he is ! ❤️
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Outstanding. One of the best medical videos here in the web!
+Dan Co thanks man I really appreciate it
Haha studying female repro in med school right now. Honestly, your presentation contains so many details i missed just by reading the books. Superb drawing btw! You also seem like a master speaker of the subject, this truly is a gold video. Thanks man!
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Im indonesian and there are other who admire your work, i personallu very much thankful for all of your video sir, i must say your effort is pretty much appreciated. And im planning to donate some of my work on your patreon
Love you sir,,salute your hardworking,,you are amazing teacher of the globe,,I just pay fee to university not absorb a single words from university,,I am copying your every lecture and remember,,you are my ideal teacher,,God blessing you,,more than 100 students I spread your lectures and daily consouling,,abundle of thanks
You just have a way of making these topics easier and more understandable. Thank you so much sir. You're helping a lot of people☺
you made medicine so much easy on me. You're vids are my best friends while studying
These videos are a lifesaver with distance learning. Thank you big time.
U r like blessing for medical student like me u made all content very easy to understand ...
It's my request plzz never stop making video .....
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I just understood this concept in less than 30 mins.
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I'm glad to learn from you sir.
Thank you so much! You cleared so much stuff for me! My professor let us go over this part on our own and the book was so confusing! 😁
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Summary-
Changes in the sperm-
1. Capacitation- alteration in glycoprotein and seminal proteins that coat the spermatozoal head.
Occurs in the uterus
Increases motility
2. Acrosomal reaction- The sperm has specific protein that bind to the zona pellucida receptors ,ZP3. Upon binding, acrosomal head opens releasing acrosin and proteases. This creates a hole in zona pellucida.
3. Fast block to polysperny- As the sperm touches the cell membrane, Na+ influx occurs .
4. Slow block to polyspermy- Smooth ER releases Ca2+ ions which activates lysosome to fuse with the cell membrane of occytes. Hydrolytic enzymes are secreted causing degradation of Zp3 proteins and hardeining of cell membrane.
Really i appreciate the contents you make. these are so coherent a question comes to the mind and next the answer comes. please keep the excellent work. I would like to see videos on Cell cycle, mitosis and meiosis.
Wow! One would think it's world war in these bodies of ours. The number of events happening at the same time is insane. Thank you, this is well understood.
Trying to get a better understanding of how this process works, and you blew my mind!! So interesting, and fairly easy to follow and understand! Wow! And... Really easy on the eyes! 😉
YOU ARE LITERALLY THE BEST. It all made sense and the whole explanation was very entertaining and fun to watch. Thank you so much
Thank you so much. You make everything as simple as it can be. Keep going god bless you 👏🏻
Helping me get through Anatomy classes one video at a time
my thanks to you, here from Brazil.
you are an amazing teacher. Deserve all the thumbs up and monetization that is possible to have
15:47 I can't believe you called me a freak over here XD
THE WAY HE DELIVERS THE POINTS! you cant be bored at all!
I really admire you sir....u help me a lot going through med school...i really wanna see u in person one day...🙂
Hey, I love your videos. They have helped me so much throughout my studies. You are honestly a god send
your lectures are very very helpful to me😊. Thanks for making embryology easier 🌼
I would not be able to understand or pass my exams and studies without your videos. Thank you so much you are our hero.
Can you please consider making anatomy videos like these please?? You're the best at explaining
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Please make lecturers on complete embryology, and Monosaccharide Metabolism, xenobiotic metabolism,Feed fast cycle.
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Honestly, thank you so much for your videos Sir. You are truly a blessing. Seriously thank you. You’re a lifesaver🥺. FromZambia 🇿🇲
so far the best vedio explaining fertilisation on a medical level
i myself as a post-graduate appreciate your effort thanks alot
These lectures are really a huge box of gold to me !!!!! Really awesome thanku so much for such a beautiful , amazing explanation !!!!!!!
The best explanation, so detailed but easy to follow. Thanks so much!
I am a aspiring candidate for NEET 2025 and your videos really helped me ❤❤
Hello Sir first of all thank you so much, Allah bless you
you make videos for free I am watching you from Kabul Afghanistan. you may do not know how helpful are your videos specially when you made all free for student like me who does not have money to pay for learning again thanks a lot we all pray for you and your team have long life and blessed and live all healthy and great
Thank you very much, i was confused,but you gave me the all points 😍😍
Thank u bro...For clearing this whole concept in a very easy way...from India
Thanks a lot for these amazing videos. A blessing in this lockdown
You explain and simplify things in a good way... I always understand
I freaking die laughing with those comment, you put in sometimes: "normal males ejaculate 200 - 500 million sperm cells, unless you're some type of freak" HAHAHAH... this is entertainment and educational! 😂👏🏼
I lack to express my joy, you explanation is excellent you're the best ever
You my friend, have a natural gift/ talent. Keep up the great work.
Thanks for the lecture. It is helping me a lot.
The number of sperm that get to the fertilization site is actually about 200, but one usually fertilizes the oocyte.
@15:47 I laughed out loud!
i was looking for this in the comments
unless u are some type of freak
@@bunyaminoztemiz6777 same
same here lol
Can't thank you enough, thank you for making it available, you are a superhero a real med ninja 🤗🤗
Excellent explanation. Best to be in the pre-nuptial councilling for couples before wedding. And good for pre-medical students before the seminar on reproductiive system of man and woman.
Don't stop ur lecture sir we need ur classes
🙏🙏🙏Namaste 🙏 🙏 🙏
You are my lifesaver. I couldnt understand anything from my professor. Love u from Thai Medical student ❤.
Your videos are very helpful! I was trying to count how many times you say "actually" but I lost track at about 100. lol
tattoogreenie you must see our Histology professor !😕
From india.... i send you a lot of wishes man💐... you are a great professor.... i really appreciate your work
Hey, I'm from Brazil. Your classes help me a lot, I'm in Nurse school.
perfect... I am an Arabic medical student..and your videos are very simple and useful..thank
I'm watching your videos alongside my lecture notes and it's ten Times more fun
THANK YOU SO MUCH!!! Your tutoring is so very helpful!
حرامات انتهى الفيديو و الله الواحد ميحس بالفيديو من كثر المتعة اليقدمها زاك
thank you zach 😍! it was unbelievable explanation
You're the best , and your videos are the best medical videos I've ever seen 💜💜💜💜💜💜💜💜
Nursing student from Kenya am enjoying the lessons.keep it up
This is the first time I am commenting here. Zach, more power to your elbow. And I read that there's no fast-block to polyspermy in mammals. To the contrary it is found in marine invertebrates like sea urchins to ensure that sperms from other species in the water do not fertilize the wrong egg. But hey, I trust you and hope you will respond. I will be over excited to get your response.
Your videos are all I watch ....I actually got a B from this lecture in my today exam thanks 🙏 ✅
Your videos are the best! They have helped me tremendously.
It helped alot, you're really a life saver!
One of the best teachers out there! Kudos
Dear, you have a good way to elaborate the complex process of fertilization
this vid is really helps me understand more than my own teacher:)
this is the only channel that i actually waant to remind me to hit the like button at the end of the video
Thank you so much for these videos sir. You are literally the best!!
amazing and amazing explanation. Thank you very much
Bro you have a wonderful teaching skills and good subject knowledge
thankyouuuuuu
man you are amazing, i'm so lucky that i found you
Great video! Quick question, is the sperm that binds to the ZP3 receptor the same one that binds onto the oocyte's cell membrane? Or is it another sperm that kind of takes advantage of the fact that the zona pellucida is now degraded and binds to the secondary oocyte?
You are th smartest person in the world at all, love you dude, thank you for your affords
Another topic crystal clear. Kudos to you
THANK YOU SO MUCH, I HAVE QUIZ TOMMOROW AND UR A SAVIOR
Amazing! I really appreciate this hope you don't stop......I need you to complete my medicine course
Lots of Love man! Thank you from the bottom of my heart
your videos are such useful , please continue , and thank you a lot
Hey Zack! it would be so awesome if you could possible make a series on obstetrics/gynae as well as neonatology!
Yeah
Thanks man. You make it clear.
I've read, and my lecturers also told this, that in humans practically the whole sperm cell enters the oocyte. Plasma membrane gets left behind but everything else goes in. I think paternal mitochondria get destroyed so only maternal ones are left, and the centrioles of the sperm cell are inherited by the zygote.
There are so many misconceptions and alternative explanations going on about what parts of the sperm cell actually enter the oocyte, and right now I'm too busy panic-studying for my exams to really look into this. Just thought I'd give y'all something to think about and maybe do your own research if you're interested. I'm gonna go with the explanation my professors gave, and hopefully pass my exams :'D