GCSE Biology - Surface Area to Volume Ratio

[@nem3sis760]

Today marks the end of my gcses. I just wanted to come back here and say thank you guys so much for being there for me. You have helped me so much throughout these past two years since I found your channel and I have eagerly watched your videos and used the resources you provided everyone to aid my revision and it has made doing my science exams much easier. I was normally someone who struggled with science for a lot of my secondary life, and finding you guys has changed that. Today I'm proud to say its my last day as a Year 11 student and I have just completed my last gcse exam. From the bottom of my heart, thank you for being there for me and other students too. I couldn't even begin to tell you the massive impact you had on me and other students. I wish everyone here who is doing gcses or even A Levels the best of luck next year! Goodbye. I will return here on results day to let you guys know what I got :)

[@Cognitoedu]

Congratulations! 🎉 Thank you so much for this message, we really appreciate it and we're glad to have been able to help you on the journey through your G.C.S.E's. Best of luck with your results and A-levels next year! 😊

[@nem3sis760]

@@Cognitoedu I'll come back here in August to let you guys know what I get :)

[@fatimaalramahi9944]

Omg this is so cute and wholesome 😭😭

[@lolzfriend852]

@@nem3sis760 my godd I’m so excited for u 🏃‍♀️🎉

[@hu37mo]

@@fatimaalramahi9944 wholesome

[@bobbob-xg8jg]

Thanks to Cognito I got 3 9s in sciences and a 9 in maths. I can't put into words how grateful I am for your videos, you've helped me and countless others

[@edwin_a]

could i ask what else you did for revision other than the videos? like did you make flashcards, write notes, etc

[@786azaman]

That's good I'm happy for u ☺️👍

[@aloyance__]

How to revise for eng lit and re. Ik this is off topic

[@pinkiepie228]

Oh my God, thank you so much. I literally never thought revision could be fun before you. This whole SA: Vol thing stumped me ngl.

[@t0mmy_phx]

Heading into my final year of secondary, and studying for my GCSE’s. You’ve helped me so much and I thank you! You’ve genuinely taught me more (Thanks to your website too) than my teacher has in a whole year. I’ll be back to update this comment when I’m done with my GCSE’s! Thank you again.

[@THE_THREE_GOATS]

You never updated the comment 😢

[@twicepilled]

my actual exams are in the next two months this does not feel real😭 anyways your website has helped me so much thank you!!

[@ficti_an]

I discovered this channel back when I started my IGCSEs, and my words cannot describe how much this channel has helped me. Last year, went from a D- in my first semester to an A in my Biology finals thanks to this channel. Thank you so much :)

[@cosmicsquid1285]

Usually I find videos to help with gcse hard to keep my concentration on, but this I can actually watch. Thank you for the help

[@Maheen.0000]

hi cognito, i just anted to say you have no idea how much you have helped me and countless other people your website is awesome.

[@pinkmangooooo]

Dear Cognito, I know this is a bit late but I only got my GCSEs yesterday. I would like to thank you so much for making these videos, you seriously helped so many people. I managed to get all 9s in triple science thanks to you and I am so grateful. Keep up the amazing work!! Thank you so much once again

[@Cognitoedu]

Ah that's incredible! 👏 Congratulations, we're glad we could help you with your studies!

[@laavanya5206]

Summary: Larger organisms require speciallised organs like transport systems and exchange surfaces (like villi and alveoli) as they have lower surface area to volume ratio (surface area deceases as the size of organisms increases) and therefore they can’t rely only on diffusion. Smaller organisms (mostly unicellular) don’t have and don’t need speciallised organs as they have larger surface area to volume ratio and so they can totally rely on diffusion for the transport of molecules. Note: surface area to volume ratio decreases as the organism gets larger and so when the surface area to volume ratio decreases the reliance of diffusion of the organism too decreases and they are more likely to develop a specialized organ.

[@crypticski3803]

I would like to say thank you so much for all you have done, I went from grade 4s and 5 at the end of year 9, to a grade 8-9 at the end of year 10 ppes, thank you so much, I hope I can do well next year too

[@nadeem1923]

Cognito please make playlists in your channel for gcse bio, chem and phy and in matching order with the curriculum. You’re a lifesaver ❤❤

[@apexracing9273]

You guys deserve atleast 10 million subs and I am serious

[@ejazali4]

Amadeus, thank you. You got me through my GCSEs.

[@user-id6su3nz4q]

i actually love you 😂your website carried me through GCSEs and literally saved them

[@michaellewis9888]

Thank you sir for helping me a lot with studies. Today is a crazy day cause I needed to revise and thanks to you, I’m going to my exam completely understanding of everything, thank you for your help and God be with you. Much love ❤️

[@sophiaj4488]

i love this channel, each video I watch is so helpful!

[@silaskapapa784]

You helped me through my Igcse's, thankyou Cognito

[@RoriSeral]

I love this channel so much😭😭easy and straight to the point

[@not...not...no.643]

hey! just to let you know, your website is really really helpful. I've been using it ever since it launched and I can see the improvement in my confidence in all three sciences. Appreciate your efforts 💯💯

[@jibzzztm]

2

[@not...not...no.643]

@@jibzzztm 🤩🤩

[@not...not...no.643]

@@jibzzztm that that i like that

[@jibzzztm]

@@not...not...no.643 e

[@not...not...no.643]

@@jibzzztm do u only speak in one letter at a time? /srs

[@dessieg6211]

Studying for my final biology exam and this video greatly helped me, thank you!! Recommending it to all my biology friends :))

[@Cognitoedu]

Glad it helped! Thanks for sharing!

[@thegreatconspiracypodcast8384]

Thank you so much this might be another one of those comments but on the bus to school before my maths gcse which I was already under prepared for I watched some of your maths videos I can say with confidence that you have helped me push my grades way up. Honestly I learnt more on that bus ride that I have learnt in class.

[@sundayisfunday1354]

I know that u have heard this a lot but I too want to thank from my part that you truly are a life saver. Whoever gave the idea of making this channel bless them & the people who are doing hardwork in maintaing this channel. No words can express the gratitude. Next year I have my gcse exams but I am worried how will I do in other subjects in A levels without your channel's support T-T. Just a request if u can do make A level videos too. Perhaps on a new channel... Anyways thank you for the great to the point content you provide. May your channel grow even more!

[@aaminahz2276]

Your channel and website is really helping me to understand science. Your videos are really interesting and you explain everything clearly (a lot of the time, better than my teachers). Thank you so much!

[@jibzzztm]

Congrats on 300k with 400 vids

[@t4aha.s]

Lol

[@pharaoh5633]

0:23 large multicellular what

[@saraibrahim9361]

He said organisms

[@blackholedividedbyzero]

I guess I need to clean my ears with shovel.

[@awais9130]

@@blackholedividedbyzero Nah it sounds like orgasms

[@bxltyy5731]

how is my mind gonna do me dirty even when im revising ._.

[@theeditlegend]

Thanks for this video, Cognito! You have really helped me get all the key knowledge for my upcoming exam into my head!

[@haadyabdul1683]

Hey man, I’m just commenting to say that my IGCSEs results came out and I got an A* in coordinated science (all 3 combined) Thank you for all the videos!

[@IfrairamIram]

❤ this is much helpful but I have got an issue that if some any digit number is been here what should we all do

[@tiarafatimaazzahrabenttahe8539]

Just wanna say I really thank you for the explaining about this subject , even thought I’m study at school in village ( use my capital language = indonesian ) , but because you I can improve my English especially in listening + improve my brain about chemistry and biology 😅

[@Cognitoedu]

Ah that's awesome Tiara! Thanks for watching 😊

[@has1219]

These videos are so helpful! Just curious when the next one is coming as it's been 4 months now. Also, you've mentioned that there will be new videos based on trigonometry in GCSE Maths, and are those still going to come, they'd be super helpful for me! Thanks for these great educating videos, they've helped we improve greatly in understanding the subjects much better!

[@Nego-h]

I love ur videos and I understand every thing and this channel needs to be bigger !!

[@killer_arzz7474]

Sir u hv helped me pass my test with last minute studying, I wish you and your family and family the best of the best. Thank you so much for your dedication, Please continue contributing to the betterment of us student.

[@floatiee]

Hello, I'm currently in year 9 and have mocks in February and igcses in may (I'm homeschooled), I just wanted to say THANK YOU SO MUCH for creating this channel and taking your time to make these amazing videos!

[@pragyagupta3329]

Omgieee THANK YOU SO MUCH for your videos. They are really helpful. Lots of love from India!!

[@rayhanaslam3371]

mocks next week, thank you man your a life saver.

[@evah]

Hi, I don't often comment, but thank you so much for all the help and explanation for all the sciences, especially Biology. It's been amazing knowing that I can rely on every video being relevant and understandable, as well as the beautiful animations. Thank you Cognito, it's truly the end of an era 💜

[@Cognitoedu]

Well we really appreciate, thank you Eva! We're glad we could help 😊

[@cqral4229]

@@Cognitoedu why did you stop?❤

[@M0Hamza9]

I have an test on Sunday and I’ve been using you since the last week for practice, wish me luck 😅

[@shr07i]

so so helpful for iGCSE students as well your platform has been extremely helpful and im so grateful for these videos. it really helps me for my exams! thank you

[@Countdown420]

You are actually the best

[@samuelehtoo9594]

I was about to drop biology off, but then I found this website. After learning here for about 1 week, I've become top of my class and get really interested in biology and want to pursue career in healthcare fields. I just want to thank you so much for this because it's helped me to much.

[@Cognitoedu]

That's awesome Samuel, we're so glad we could help! Best of luck 😊

[@Rexus0705]

@@Cognitoedu Hi Cognito. Hope you guys are well. Will you guys keep releasing videos in the future?

[@PhonkAttack4DX]

why did you keep saying 'specialized exchange surfaces' when it showed specialized exchange systems?

[@Wojbest_YT]

congrats on 300k keep making great videos

[@sarutouzochia2680]

This was on our 2022 biology paper 1 higher

[@Hanan-xl9km]

Hi cognito, I’ve just received my gcse results and got a 99 for science. I’m so happy and it’s all thanks to ur very helpful and educational videos that made my science journey easier for me. ❤️❤️💓💓💗💗💕💘💝

[@Cognitoedu]

That's awesome Hanan! Congratulations! 👏

[@cursory9031]

I remember watching this for past 2 years for my high school examination in March22, never knew I could get the best result I ever had thanks to this channel. Now I'm entering university, wish me luck!

[@Cognitoedu]

Thanks for watching! Best of luck with uni!

[@ipeka14]

your videos helped so much while studying for my igcses, im so happy with the grades i got and its thanks to this channel! im moving on to A level now and i was wondering, are you ever planning on making videos for A level?

[@TEGbruh]

Thank you, because of you and this channel I was able to obtain the highest grade possible for chemistry.

[@Aneesah96]

Thank you for creating and producing your videos. They are a massive help to me, especially for my learning style: simple and concise. I am doing my GCSE’s this year and I am very grateful. Also, just thinking ahead, I was wondering if you are planning on ever making A level content videos as they would be a great aid in mine and I’m sure many other student’s learning journeys. Overall, I just wanted to give thanks for all the effort you put into your videos. 🎉

[@Brados-nt9xl]

I just got my results for my gcses I got an A in physics and a B in chemistry. I am so happy and I honestly dont think I could have done that without you!!!!

[@Cognitoedu]

👏👏 Well done Brados, we're happy we could help!

[@en3rgy906]

thanks so much ur voice is so calm and relaxing which helps me concentrate i was able to achieve grades 7s with 1 - 2 days with cognito rather than through my teacher in years (was at a grade 5)

[@felicialaw4285]

This is so helpful! Thank you for your hard work! I loved all your videos!

[@Cognitoedu]

Thank you Felicia! 😊

[@paulmurfin5730]

Hi On your main website could you add the ability to print out all the papers and questions by subject in one go rather than each one individually?

[@mimisolo7778]

That's a really good idea yes please

[@paulmurfin5730]

Absolutely brilliant videos and website btw my daughter puts you up there alongside Zeus ! 😀

[@omarmalkawi1383]

Really helped thank u so much i had an exam and u helped me sm

[@taragaur8369]

I just wanted to say THANK YOU SMMM for all the help during my gcses!!! I got all 9's for bio chem and physics and ur videos helped me sm :)

[@Cognitoedu]

Ah congratulations Tara, that's great! Glad we could help 😊

[@hassansahal1743]

Just finished watching the whole biology play list in less than 12 hours, as revision for my exam tomorrow. Hope it proofs useful.

[@itsmaherferas]

You are literally a life SAVER!!! thank you sooooooo much for EVERYTHING... the physics, Chemistry, math and biology. I just wanted to ask you, will you still make videos about genetic modification and use of microorganisms in production of food such as yogurt and wine?

[@Vafe17]

I just wanted to thank you for the help you gave me on my GCSEs, I hope my efforts paid off and paired with your amazing videos I’m hoping for good grades, for the entire team at cognito I thank you for your help and amazing videos.

[@Cognitoedu]

Ah you're very welcome J Lott! Best of luck with your results 👍

[@MumtozaMirzaakhmedova]

wouu it's very helpful thanks!!!!!!!

[@mohammadzaman6823]

Bro I just honestly wanted to say thank you u helped to get amazing marks love u brother

[@Cognitoedu]

Happy to help Mohammad!

[@mubashsharamaliha9763]

Can you please suggest why I’m not getting the CIE 2023 -2024 course selection option in the website?

[@xdkl3907]

Are all of these videos including maths and all the sciences compatible for IGCSE like Edexcel?

[@nickyduese3948]

Please,how do you make your videos

[@Priya-r2x]

where can i find the resources for revision?

[@M0Hamza9]

You have absolutely helped me so much! I am using your website and feel really confident for my gcse next year 🤩 thanks mate

[@Cognitoedu]

Happy to help Mohammed!

[@habeebakhanam5779]

Your guys videos has helped me immensely for my gcse's , could you guys make videos like these for common A levels like maths and the sciences,thankyou for all the help you guys have given.

[@wsp313]

Cognito i have signed on to your website but it’s not working for me :( I’ve been using your website for about a couple months now and for some reason isn’t working for me

[@SA-ne5nv]

me too. i think because a lot of people are using it because the exam is tomorrow

[@wsp313]

@@SA-ne5nv yeah it now came up with “something is wrong current link has expired or is invalid” hopefully they fix this soon

[@sayedullah4343]

@@wsp313 yh same i was switching lessons and it jst says link expired

[@s6crissy418]

it's back up

[@sayedullah4343]

@@s6crissy418 gg

[@basaaaan]

your website is sooo helpful 💪😎

[@incognitooooooooooooo123spy]

thank you so much for creating these videos and also the website which are so helpful and helped me during my gcse revision thanks to you i got a 9-8 in combined science and im so happy you guys are amazing💗

[@Cognitoedu]

You're very welcome and congratulations, those are great results 👏

[@SensouFn]

what software do you use?

[@thegeekaboveall2711]

honestly your visuals are stunning you should make flashcards!

[@ciaraduffy4217]

Hi there, I am a science teacher and I think you channel is great. I always recommend it to my students. I really love the layout of your presentations. I am wondering, would you mind telling me what app you use to make your presentations? Best wishes, Ciara

[@Cognitoedu]

Thanks for the kind comment! This one was made using sketchbook on the iPad, and iMovie - in a bit of an unintuitive process. These days we use Adobe after effects :)

[@cappercorps7430]

What are your plans for the next subject

[@StefanCO1234]

Your site is relly good ,could you please make sure that all videos are linked to their topic please Thank you

[@yemen9219]

Thanks for teaching me something my teacher can't

[@kara2942]

Finally I understand this thx!

[@MLearners]

Can you make year 7,8,9,10 videos?

[@HerkusM]

Could we possibly get a level physics videos for when I go to sixth form?

[@srinithichakraborty6702]

hey!!!! you really helped me for my biology exam. I got a 4 which is what I was aiming for since i got a U (but i think that it was not my fault as the diagrams were printed badly) last year, Thanks!!!

[@saimayounas4301]

I am surprised this channel gets so low views!!! They doent deserve that for their massive help. So do em a favor and share the video!!!!

[@not...not...no.643]

hope you dont mind me pointing out, there's a slight mistake in the topic names for edexcel higher physics: topic 6 is named radioactivity which is correct, but then topic 7 is also named radioactivity when it should be astronomy. as ive already said, the website is incredible thank you so much🌟🌟

[@jibzzztm]

1

[@not...not...no.643]

@@jibzzztm 😋😋

[@not...not...no.643]

@@jibzzztm why are u counting my comments 😭😭

[@not...not...no.643]

@@jibzzztm 1 2 3 to the 4 🤩😣😏😪😑🤐🤯😩🥵🥶😨🤢🤮🤕😷🤬😠

[@Tom-nl8vp]

Hey Cognito please can you do GCSE computer science as another subject you teach please, that would be lovely???🙏

[@mustafaabdelkarim4255]

Hello I am actually studying IGCSE and I want to thank for your effort, you'r such a great guy! I want to ask why is the CHEMISTRY exam Qs by Topic are not working ?

[@SamirKhan-ee6bd]

What tools did you use to make such amazing videos.

[@kimjarvis7355]

He definitely doesn't say 'organisms' at 0:23 haha

[@siobhan2395]

please make a video on calculation area of composed objects

[@naho438]

I’m in 9th grade right now advanced level, I’m just starting to watch your video my finals are in one week or 2 my biology exam is the third one so I don’t have a lot of time and my clas exam is gonna be this week I didn’t bad in thr past 2 so I hope I can understand fast!

[@nevasimsek1]

These videos are really helpful, thank you :) Could you please do one one the nitrogen cycle ? Those of us doing OCR Gateway would really, really appreciate it.

[@sui9452]

Thanks to you I got a 8-7 in my double science ☝️

[@Cognitoedu]

Great stuff - congratulations and well done for all your hard work!

[@blackpinkinyourarea3002]

Heyy!! Your videos are very catchy and easy to follow along. Especially the website’s amazing, I’m being able to judge my progressions and being able to work more on the weaker one. I’d like to make a request to you to pls cover up the computer science topics for the O- Levels as well since there aren’t much content creators for it like for physics, chemistry etc.. Hope you’ll do it soon, and thank you once again

[@ibraking_1939]

I used the best website there is for science and it was your's cognito, So can u please add A-level biology videos made by u. I'm sure it would help u more than it will help me.

[@thehunterwr4666]

Hey guys I love your vids they help me a ton! I wanted to say when are you working on your next video? And what might it be

[@markmark3970]

Thanks a lot, this really helped me.

[@ozzydizzy]

I think you guys should also make videos on GCSE English, that way it will be so much easier to study for our exams

[@jerbey8405]

bit of a late thankyou, but your website with the videos and questions saved me during gcses and now im studying biology for an a level. You taught me more then anything ive ever learnt at school. tysm

[@mimisolo7778]

Cognito should do a course on psychology

[@zarifahjaima9843]

Hello, I would like to ask for a GCSE math video about linear programming.I tried searching other videos, but it is no help. Can you please make one?

[@MitchuMax2327]

Did anyone notice that this is the 400th video of this channel?

[@jax1296]

Can you add your new updated osmosis video to your biology playlist. It’s annoying me. 😉

[@adoptmescammeralert6299]

Please explain thermal decomposition