Respiratory Tract 

The best teacher on RU-vid.you simplify make these concepts and explain them so well.thank you so much doc

Man there are alot of people who explain on RU-vid but non of them is as good as you you are the best

I feel so lucky that I found out this channel. Thanks Dr. Mike!

Best Physiology tutor ever

so surprised how this great video have not that much viewers

Very well explained. Thank you so so much for taking time to go into so much detail. That is my lecture reinforced.

No one can explain human biology as well as you do..... 🙌 I follow ......ONLY YOU for my biology classes. Thanks a lot❣

It's awesome... Thank you so much for a quick review to all the lengthy stuff...

Love ur videos u explain very well for people learning thank u

You are amazing dr thank you 🙏🏻

really love ur channel!! its soo useful for my bio teaching thank you so much :")

Thaankyoou!! Very helpful. Understood everything .

Thank you

Your the best

thank you so much, you are really the best! I understood the system even that english is not my language and I'm not good enough in english. but I got the all information. thanks

Greetings from Saudi Kingdom

Thanks

May you please do more videos on the brain? Anatomy and function of different parts of the brain

thanks lots...

THANK YOUUUUU

Please make videos on head amd neck

thank youuuu :)

Ok, I get it now!

14:53 well that is another way to say dead

Wow

Why ur so handcome doc?

Notes plzzzz