this video is literally perfect you covered everything I learned in 5 minutes I'm saving this for future use👍

love this
  tmrws my exam and  u legit just saved my life tnks so much dude:eyes-pink-heart-shape:

Simply, Wow. Thank you so much.

very concise of all videos i've watch. Thank you

Thanks for explaining.

Thank you so much sir ❤️

Thank you very much

Keep up the good work 👏

Its really helpful,great video

Thanks for explaining

Thank you so much for the precise and concise video.

Great videos!!!!!

Excellent video! you deserve more views!!

Thank u so so so much

Very nicely done ^_^ very informative and stright to the point ^_^

Amazing videos better than school

Actually it was amazing vedio 😍😍😍😍😍😍😍and pls do the respiration system 🙏🙏🙏🙏🙏🙏🙏

Very helpful video

I need explanation abaut  enzymes

qualtiy 🔥🔥🔥🔥