Countercurrent Exchange (Gills) 

This is the best explanation for counter-current exchange in fish gills that I've found so far. Thanks so much!

thankyou so much Sir 💖 The best explanation of counter-curret

-Countercurrent ensures there is a continuous conc. gradient across the gill filament

This is information that would be useless for me in the real world and my profession...but MAN did it ever feed my hunger for knowledge...Now I am BEGGING for someone to ask "how does fish get Oxygen from water".... You sir are a great teacher.

sir you might have just saved me ... I have been trying to understand this for so long.........THANK YOU SO MUCH

These videos are so helpful. Simplest explanations that I've ever seen

Amazing explanation skills. Thanks you for taking your time to make these videos. Its teachers like you that keep me interested in Physiology. Thanks so much!

One of the greatest presentation of concurrent and countercurrent gas exchange. I love it! Please continue to do more videos :)

Thank you so much! This is me wishing you a lot of good karma your way. Keep educating and helping students! You rock.

you are the reason why I won't skip this question in my A level exam. many thanks x

You're the man, I finally understand this concept, THANK YOU SO MUCH!!

Thank you very much , your clear and simple explanation really made me understand the process. Have a great dayyyy

These information is really understandeable and educateful............. it really helped me alot in my studies....... thank you

I find this video is quite good. The clear explanation makes me understood a lot.

So grateful for the information from someone just curious about nearly everything about how life works. Up to my gills in questions about life, maybe the flow is the same direction instead of opposite.

Thank you so much for this information! I had lots of trouble understanding abt this one and your video is so helpful! You just earned a new subscriber ^_^

I know that your explanation would be simple and easy to understand. Thank you.

First off, thank you. Understanding a theoretical complete exchange made perfect sense. I became interested in the subject after reading about the Salmon Shark and how it uses countercurrent to stay warm. I understand tuna do this as well. I'm a bit confused as to how this happens using this same gas exchange.

This video is the most helpful one about countercurrent exchange!!

Thanks for the detailed and clear explanation! Hope your able to make more videos like this to address difficult concepts :)

Amazing explanation! Thank you so much! it all make sense now!

Amazing explanation! thank you!

Best explanation🙌💯

Thanks a lot I really appreciate The time you took to make this video

God not nature make it always efficient😊

nice

Thank you this was super clear to me !!

Way better than my teacher

Here's a very good teacher

amazing video sir ☺

Doesn't really explain why a continous concentration gradient is occuring. Still good overview of the topic

great video

U are a good tutor

Thank you, helped in my ncea level 2

so so good

😍😍

Amazing thank u so much

Thank you, sir.

so useful thank you!

Thank you so much!

Sir So great

brilliant!

thank you!

Hi can you upload the video on reproductive system of fish i need and for this thank you

thank you sir

So while fish might be less intelligent, their bodies adaptive mechanisms are not.

finally clicked!