The Mammalian Heart & Cardiac Cycle

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Revision video for AQA AS Biology Unit 1 - Biology & Disease.
In this video, we look at the Heart; it's structure and the importance of valves. We also look at the cardiac cycle; along with the role of the nodes.
This is a difficult topic; and it's quite an intense video, so it might be worth viewing this in stages.

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7 июл 2024

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Комментарии : 206

@reyna7100 8 лет назад

Imagine what your grades would be like without videos like this... :'(

@MrPollockBiology 8 лет назад

Glad I'm helping to boost your grades :) Stay positive!

@robertstarhanovs2844 8 лет назад

Exactly. I am watching this right before the exam today and this is of great help. Quick and simple revision!

@flarezard4746 7 лет назад

^ Quick and simple revision... well you see, I never really attended classes, and I'm only just learning about these things 2 days before the exam, and this is my building block before I actually start reading the book. :V Though I must point out that there have been some different variations and condition than were explained by him differently(ex: transport in phloem) sometimes there is actually a low conc of sucrose within the sieve element which just allows for facilitated diffusion instead of pumping and active transport, although the companion cell does need to use active transport to move H+ ions to the sieve element to move from palisade cells toward to companion cells with ATP.

@flarezard4746 7 лет назад

It kinda confused me at first because what I read from the book and what he explained were different, but I understand now, also, I think I should leave this... and homeostasis for last >_> THANKS FOR THE VIDEOS DUDE

@kiileetsoku2397 5 лет назад

Brooo🌚🌚🌚!

@rafkadib3884 5 лет назад

Thank you soo much..this video is wayyy better than reading my text book like 10 times

@sprognosisj8924 9 лет назад

I misheard and thought he was going to show the flow of the blood with 'this pink duck.' Imagined a little toy duck moving around the diagram, made me smile.

@fluffysheep1998 7 лет назад

I'm really triggered by the way you say diastole and systole but I can get over that because of how amazing this video is - saving my A levels one step at a time

@huzafah 4 года назад

lol that's how you say it....

@user-tz5pz8ev7u 4 года назад

@@huzafah nah its not

@huzafah 4 года назад

@@user-tz5pz8ev7u great keep saying it then

@user-tz5pz8ev7u 4 года назад

@@huzafah yeah I will thanks

@user-tz5pz8ev7u 3 года назад

@leondesu_ oooh sorry

@victoriapownall4871 9 лет назад

SO much easier to understand than the overly wordy textbook ! thanks

@MrPollockBiology 9 лет назад

Glad you think so!

@Jaybreal06119 8 лет назад

Thank you much for explaining this in a magnificent way. I'm preparing for my boards for Physical Therapy and cardio has always been a weaker area for me. This literally set off the lightbulb I needed. Thank you for taking the time to do this and for having made it so simple.

@LaithzProducctionz 8 лет назад

Best thing For last Minute revision

@cbeadlesheart 9 лет назад

Amazing! Thank you so much! I completely understand it, rather than just remembering the cycle and everything that goes on, I now understand WHY that's the case!

@terry3494 3 года назад

Absolutely a life saver, I watch your video every time I need to revise, got a big test coming up on Thursday this week! Thank you so much they are so easy to understand.

@gabefernandes3471 8 лет назад

Its so lucky the new AS course has enough overlap, I was worried I wouldn't find any relevant videos but the pressure graph and node info was exactly what I needed, cheers bro

@MrPollockBiology 8 лет назад

+Gabe Fernandes No worries; new AS isn't a great deal different to the old one. My channel should help :)

@toobabunny2779 7 лет назад

Really, really, really, really (infinite) helpful.

@katieknepper34 8 лет назад

I use arteries go away or 'art' (out) and veINs go IN

@MrPollockBiology 8 лет назад

Whatever works for you :) Thanks for sharing!

@ebunoluwataiwo9975 5 лет назад

Thanks doode

@salmanqureshi3361 6 лет назад

you explain this so well! I learnt more in this video than I have in 3 years of learning about the heart at A-level... Can't thank you enough for these great videos :)

@dexterdan6127 8 лет назад

Great video. Have watched it like 5 times now. Memorised and ready!

@arabellabaker7506 8 лет назад

thank you! so much, my teacher doesn't do a lot of teaching... this helped so much! thank you so much :) your whole channel is helping me so much

@MrPollockBiology 8 лет назад

Glad you're enjoying!

@empearson2386 8 лет назад

I've found it works to remember arteries away from the heart and veins visit the heart, thanks loads this is great revision

@justordinary4039 2 года назад

This is absolutely useful! I am a visual learner so I am glad you illustrated the flow of blood into the heart. I am recommending this to my classmates. Thanks so much!

@TheTubefan75 5 лет назад

Thank You Mr Pollock. You are a LIFE SAVER! God bless. :)

@realhealthyfood 7 лет назад

Your explanation of the graph was so helpful thank you!!

@silviaplath56 8 лет назад

Thank you SO MUCH! This is pure gold

@believeyourself956 5 лет назад

I've got u this may June 2018 but I'm working my ass off for the comming oct-nov 2018 and you are helping me alot 🙏 you are the only teacher I have I count on my as 💖💖💖💖

@joeysnaith3253 3 года назад

Great job Mr Pollock!

@iqrazahoor6103 8 лет назад

this guy is amazing ! thank you so much for saving my life !! I have my As biology paper day after tomorrow. I wish I could find more videos of yours. Thank you once again !!!

@MrPollockBiology 8 лет назад

Thanks for the kind words; hope the paper went well for you!

@hwelchuk 4 года назад

this video was so so helpful, thank you so much! finally understand the heart

@shanzeyrehan7378 5 лет назад

Best video on cardiac cycle found on youtube. Thank you

@pinkbettas587 5 лет назад

You've just earned yourself a new subscriber! Really helpful Thank you 👍

@ishakjamil1081 7 лет назад

You are a top notch lad, made this topic so simple! Cheers mate!

@midhatzehra9279 6 лет назад

“Oh, there’s the summary” 😂😂 Thanks for this video!! ♥️✨

@xXTheStarGazerXx 10 лет назад

Thank you so much for this video, sir! It was very helpful! I'm going to totally ace my mock tomorrow, and the tips you gave in order to remember are great too (A.A and E.E) :D

@enajaluap 9 лет назад

Thank you for this really clear explanation!

@mistarizla 9 лет назад

Thanks so much for this 1 day left before my unit 1 exam, gone from my least known topic to my best topic! :)

@MrPollockBiology 9 лет назад

Njmstorm Glad my video has helped you gain some confidence! Best of luck!

@fshfigy 9 лет назад

I couldn't make head or tail of this subject until I watched this video, thanks very much! Extremely helpful!

@MrPollockBiology 9 лет назад

Glad you think so! My pleasure.

@fatiman5344 9 лет назад

tysm for this video!! Really put it onto simpler terms :)

@missfairtrade 9 лет назад

Absolutely brilliant! Thank you so much :)

@MrPollockBiology 9 лет назад

hamsini blue No worries!

@jennifriesss 10 лет назад

OMG such a lifesaver, completely understood the entire topic after watching this video . good job !

@MrPollockBiology 9 лет назад

Glad I helped!

@memaabatota9764 7 лет назад

Many Thanks ! Greetings from EGYPT 😊

@Fotograf110 4 года назад

This is a very good video. You have explained cardiac cycle very clearly with good diagrams. Thank you so much.

@nolapaul5492 9 лет назад

Love button please... and thank you for taking the tone to explain and upload this video. 😄😊

@MrPollockBiology 9 лет назад

Nola Paul Haha, no worries :) glad I could help!

@a.rahmansalah9582 6 лет назад

Thank you so much for the amazing lesson .I really understand :).God bless you

@creesrees6235 3 года назад

thanks for the help. very generous of you

@IslaJohnson01 4 года назад

love this vid thank you mr pollock !!

@PaulSt-Germain-c7u 6 лет назад

Awesome video. Please upload more.

@rebekahgair3260 3 года назад

great video!! thank you!

@nikita-marie5907 7 лет назад

This is explained so well. I understand everything and have learnt more in this video than in the lesson :)

@eesha5906 5 лет назад

Amazing video!

@TortTf2 7 лет назад

My exam is tomorrow so this is excellent for not learning anything new but helping me remember the things I knew, much more easily and in more detail. Thank you.

@TortTf2 7 лет назад

Also I remembered by Arteries AWAY , VeINs

@mirtazaikram7109 4 года назад

Really appreciated it!!!

@veerendrakamath3198 9 лет назад

You have really done a wonderful work for me it was important that you saved my time nd helped me know a lot more with school days basics....:) :)..Thnaks so much

@The_Reductionist 9 лет назад

doing edexcel, but apart from the nodes it requires the same knowledge, great help, graph was my main tripping point on this subject, i intended to memorise it but now i actually understand it. Thanks a tonne!

@MrPollockBiology 9 лет назад

Boby Gandhi Thanks!

@candiceclews 6 лет назад

Great video, thanks:)

@bhavinihirani4437 4 года назад

This is amazing.

@suchismitadigal4285 7 лет назад

I'm watching this video to prepare for my exam and it gives me the knowledge I'm in need.

@Haberly 5 лет назад

THANK YOU SO MUCH FOR THIS!

@chavezedem 9 лет назад

i really understood everything in you taught.. Good Work.. God Bless U !

@MrPollockBiology 9 лет назад

Thanks; glad I could help!

@andreeaherself 7 лет назад

Thank you so much for this video!

@hemishamadhow5033 4 года назад

thank you so much man. love you

@areejmalik8025 6 лет назад

Thank you so much for this! 😭🙏🏻

@MsLilia74 8 лет назад

You are amazing!! I could never fully grasp the whole concept of the heart & cardiac cycle until I watched your videos!

@MrPollockBiology 8 лет назад

+MsLilia74 Cheers!

@teeohh4151 8 лет назад

Trust me the heart is an easy topic but I hate it. You've made it so much more comfortable for me! Thanks so much.

@MrPollockBiology 8 лет назад

Glad I could help!

@sabahakhtar1302 7 лет назад

This video is actually so good!!!!!!

@IAmYuunus 9 лет назад

Thank you so much I really understand now.

@ertancimen 9 лет назад

You're awesome man!!

@MrPollockBiology 9 лет назад

John Bill Cheers for that!

@cher6 8 лет назад

Thank you sir! This was very helpful

@elliepriceeq2399 5 лет назад

Thanks so much! I was so confused before watching this video, hopefully I'll remember it all for my exam next week😄.

@Titan-un3zu Год назад

Thanks, this was very helpful for my AS biology mock

@littlemisspoppiepie 10 лет назад

Great, thanks!

@MrPollockBiology 10 лет назад

Thanks for your support!

@christaglo014 7 лет назад

Great video!!! Great review for exams!!!

@alevelsdemystified3410 6 лет назад

Good video!

@areebshaheen970 6 лет назад

i loved this video it really summarises the topic well

@aishasalim1511 10 лет назад

love your videos, such a lifesaver :)

@MrPollockBiology 10 лет назад

No probs!

@VarunSingh-ds1hw 7 лет назад

its become very easy to understand.thanks sir..

@szyid6346 5 лет назад

i swear i did my exams without reading the book and watch your videos instead. still managed to get an A (thanks)

@allankasumba5591 3 года назад

Thank you very much .l like the way you explain

@emilylouise902 9 лет назад

This was so helpful! (I'm doing Edexcel but obviously there are crossover points) This video has really helped me understand the subject better, where the textbook has failed! Thank you :-)

@MrPollockBiology 9 лет назад

Emily Eskdale Thanks for the kind words; glad you enjoyed!

@helgatanny 8 лет назад

thank you !!! feeling so smart right now

@MrPollockBiology 8 лет назад

+Helga Tanny Glad I could help!

@sooma1menna 8 лет назад

Tomorrow is my exam and you have no idea how much this helped thank you

@MrPollockBiology 8 лет назад

Good luck for tomorrow!

@jasmine-go5wu 5 лет назад

I have some questions... AV valves closes when pressure of V>At(is it due to preventing back flow back to atria, forcing blood out of ventricles???) AV valves reopens when pressure of VAO ( is this when blood has to pump out of the heart??) S valves close when pressure of V

@annahavlickova79 5 лет назад

thanks, that helps a looooot!

@manuvlogspvs2288 4 года назад

Perfect revision for exam, thank you.

@aragonavi6731 9 лет назад

T9x for making this amazing vedio... Helped a lot in synchronizing all the chaos of words I got from my textbook... Love and regards.from INDIA.LONG LIVE

@MrPollockBiology 9 лет назад

Rishay Raj Thanks for the support! Happy to help!

@ardrarajanardrarajan4612 5 лет назад

Thank you so much and what i say I don't know ,this video is very useful and helpful video tomorrow is my exam and i see the video and not read away the text book

@terobau3380 4 года назад

Omg u sound like my economics teacher. Listening your voice reminds me of him ,which motivates me to study harder including biology cuz he is a good teacher even tho I don’t study economics anymore❤️

@yusufromdul 7 лет назад

very good video, helped me a lot

@kiileetsoku2397 5 лет назад

BEST TEACHER EVER!!🙆🏽‍♀️😫♥️

@hanakimural776 10 лет назад

Thank you , just started reading on this topic and this helped alot!

@MrPollockBiology 10 лет назад

Thanks! Glad I could help!

@ghsjgsjg53chjdkhjydhdkhfmh74 4 года назад

Wow I finally understand...thank you!!😍

@gulzaibchaudhary900 6 лет назад

Excillent .....your explaining style too good ..plzz makes more vedios on another topics as well

@cindybesitos8933 5 лет назад

Omg you are Amazing thank you!

@JalebiJaan 9 лет назад

best video & explanation!!

@MrPollockBiology 9 лет назад

JalebiJaan Appreciated!

@shahd1662 5 лет назад

thank you!!!

@user-1234gbhfavd 4 года назад

this guy put snaprevise to shame w this vid.. first actual good vid of heart and circulation thx alot

@elbunitam5256 9 лет назад

This vedio is amazing. Thank you so much

@MrPollockBiology 9 лет назад

No problem!

@Imperfecto365 10 лет назад

again very concise and great notes. i appreciate this

@MrPollockBiology 10 лет назад

Glad it's helped!

@Imperfecto365 10 лет назад

just wondering if u going to put any aqa as biology videos up!

@MrPollockBiology 10 лет назад

Thanks!

@MrPollockBiology 10 лет назад

Amar Shah I can upload some more as soon as I get time to make them! I've just uploaded one about standard deviation and also one about Index of Species Diversity. Any other topics that you would like?