The Mammalian Heart & Cardiac Cycle
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- čas přidán 21. 07. 2024
- 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.
![Anatomy of the Heart: Structures and Blood Flow [Cardiology Made Easy]](/img/n.gif)
Imagine what your grades would be like without videos like this... :'(
Glad I'm helping to boost your grades :) Stay positive!
Exactly. I am watching this right before the exam today and this is of great help. Quick and simple revision!
^ 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.
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
Brooo🌚🌚🌚!
Thank you soo much..this video is wayyy better than reading my text book like 10 times
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.
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
lol that's how you say it....
@@huzafah nah its not
@@user-tz5pz8ev7u great keep saying it then
@@huzafah yeah I will thanks
@leondesu_ oooh sorry
SO much easier to understand than the overly wordy textbook ! thanks
Glad you think so!
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 :)
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.
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.
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!
Great video. Have watched it like 5 times now. Memorised and ready!
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!
Best thing For last Minute revision
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
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
+Gabe Fernandes No worries; new AS isn't a great deal different to the old one. My channel should help :)
This is a very good video. You have explained cardiac cycle very clearly with good diagrams. Thank you so much.
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 💖💖💖💖
Best video on cardiac cycle found on youtube. Thank you
You've just earned yourself a new subscriber! Really helpful Thank you 👍
I've found it works to remember arteries away from the heart and veins visit the heart, thanks loads this is great revision
Thank You Mr Pollock. You are a LIFE SAVER! God bless. :)
You are a top notch lad, made this topic so simple! Cheers mate!
this video was so so helpful, thank you so much! finally understand the heart
Thank you SO MUCH! This is pure gold
Great job Mr Pollock!
Your explanation of the graph was so helpful thank you!!
This is explained so well. I understand everything and have learnt more in this video than in the lesson :)
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
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 !!!
Thanks for the kind words; hope the paper went well for you!
Really, really, really, really (infinite) helpful.
Thank you so much for the amazing lesson .I really understand :).God bless you
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
Glad you're enjoying!
OMG such a lifesaver, completely understood the entire topic after watching this video . good job !
Glad I helped!
Thanks so much! I was so confused before watching this video, hopefully I'll remember it all for my exam next week😄.
Thank you for this really clear explanation!
Awesome video. Please upload more.
I couldn't make head or tail of this subject until I watched this video, thanks very much! Extremely helpful!
Glad you think so! My pleasure.
Thanks, this was very helpful for my AS biology mock
I'm watching this video to prepare for my exam and it gives me the knowledge I'm in need.
“Oh, there’s the summary” 😂😂
Thanks for this video!! ♥️✨
thanks for the help. very generous of you
Many Thanks !
Greetings from EGYPT 😊
tysm for this video!! Really put it onto simpler terms :)
its become very easy to understand.thanks sir..
Thanks so much for this 1 day left before my unit 1 exam, gone from my least known topic to my best topic! :)
Njmstorm Glad my video has helped you gain some confidence! Best of luck!
i loved this video it really summarises the topic well
Excillent .....your explaining style too good ..plzz makes more vedios on another topics as well
i really understood everything in you taught.. Good Work.. God Bless U !
Thanks; glad I could help!
I use arteries go away or 'art' (out) and veINs go IN
Whatever works for you :) Thanks for sharing!
Thanks doode
Absolutely brilliant! Thank you so much :)
hamsini blue No worries!
Thank you very much .l like the way you explain
Amazing video!
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❤️
great video!! thank you!
love this vid thank you mr pollock !!
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!
Boby Gandhi Thanks!
This video is actually so good!!!!!!
i swear i did my exams without reading the book and watch your videos instead. still managed to get an A (thanks)
You are amazing!! I could never fully grasp the whole concept of the heart & cardiac cycle until I watched your videos!
+MsLilia74 Cheers!
Thank you so much for this video!
This is amazing.
Great video, thanks:)
Great video!!! Great review for exams!!!
Really appreciated it!!!
Perfect revision for exam, thank you.
during atrial systole, don't the AV valves open, and the SL valves shut? not sure, so I was asking ( at 11:10 )
Love button please... and thank you for taking the tone to explain and upload this video. 😄😊
Nola Paul Haha, no worries :) glad I could help!
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 :-)
Emily Eskdale Thanks for the kind words; glad you enjoyed!
Thank you so much I really understand now.
very good video, helped me a lot
Thank you sir! This was very helpful
Thank you so much for this! 😭🙏🏻
thank you so much man. love you
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
Rishay Raj Thanks for the support! Happy to help!
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
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
I would like u to make a video on immunity As biology .thank u
Thank you , just started reading on this topic and this helped alot!
Thanks! Glad I could help!
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.
Glad I could help!
Wow I finally understand...thank you!!😍
Wait...in the video it says that atrial systole and ventricular diastole are the same...so in atrial systole the atria contract...but in my textbook it says that during ventricular diastole the atria and ventricles relax..?
BEST TEACHER EVER!!🙆🏽♀️😫♥️
What is the third heart sound? 14:46
THANK YOU SO MUCH FOR THIS!
I do ocr but your videos are very helpful❤️❤️❤️
thank you !!! feeling so smart right now
+Helga Tanny Glad I could help!
Good video!
love your videos, such a lifesaver :)
No probs!
this guy put snaprevise to shame w this vid.. first actual good vid of heart and circulation thx alot
Thank you so much. Very helpful and concise. Are you a teacher?
thanks, that helps a looooot!
Great, thanks!
Thanks for your support!
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.
Also I remembered by Arteries AWAY , VeINs
This vedio is amazing. Thank you so much
No problem!
You're awesome man!!
John Bill Cheers for that!
best video & explanation!!
JalebiJaan Appreciated!
Omg you are Amazing thank you!
again very concise and great notes. i appreciate this
Glad it's helped!
just wondering if u going to put any aqa as biology videos up!
Thanks!
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?
Tomorrow is my exam and you have no idea how much this helped thank you
Good luck for tomorrow!
Have to attend my biology test today
Good luck🙏🏻💪🏻
Very interesting 🤔🤔🤔
that's really good and easy to understand.
Glad you think so! Thanks!