xylem water in an upwards direction from the roots to the leaves phloem ions and food in a downwards direction leaves to the roots bright light = more transpiration (more light means more photosynthesis which requires more water) high temperature = more transpiration (rate of reaction happens faster) high wind = more transpiration (wind brushes against the leaf and moves things out the way so diffusion can happen) high humidity = less transpiration (water will struggle to move around due to the high water concentration in a humid atmosphere)
xylem water in an upwards direction from the roots to the leaves phloem ions and food in a downwards direction leaves to the roots transpiration: high te
vena cava where blood enters into right atrium down through a valve into the right ventricle up and into lungs via pulmonary artery back into heart via pulmonary vein into left atrium then left ventricle aorta pumps around the body (V A V A V A V A) valves prevent backflow the left side has a much larger muscle as it must pump blood around the entire body whilst the right side only must pump blood to the lungs red B.C have no nuclei and a larger surface area to carry more oxygen white B.C are apart of the immune system platelets are fragments of cells that are important for clotting Arteries: -thick walls as they carry blood under high pressure -thin lumen Capillaries: -only one cell thick to allow for diffusion -usually in found in a mesh like foundation in the gut and lungs for a large surface area
Hi itzsaif, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide by signing up to my mailing list here mailchi.mp/161c4e43b8bf/primrosekitten and get workbooks from www.primrosekitten.com/collections which has everything clearly laid out for you
vena cava where blood enters into right atrium down through a valve into the right ventricle up and into lungs via pulmonary artery back into heart via pulmonary vein into left atrium then left ventricle aorta pumps around the body (V A V A V A V A) valves prevent backflow the left side has a much larger muscle as it must pump blood around the entire body whilst the right side only must pump blood to the lungs
the video was helpful but maybe sort out the sound quality and write down the stuff before the vid cuz it gets kinda slow whilst watching u write it all down
This was uploaded 3 years ago, is it okay to revise it for this year`s exams, please upload the latest video related to ocr combined science foundation, I have purchased predicted question plus sign for youtube gcse
Hi John Smith, this video is a short summary and can never cover everything in a much depth as you go into in class (full explanation ruclips.net/video/K6d4oOq-pmU/видео.html ) If you want to make sure you've covered all the bits you need then I suggest you watch this in combination with using my FREE revision guide available by signing up to my mailing list mailchi.mp/161c4e43b8bf/primrosekitten there are workbooks on my website www.primrosekitten.com/collections I've rewritten the specification and it clearly shows you everything you need to know.
ivf advantages: u get a baby disadvantages: - must take many drugs for a long time which include bad side effects - long term side effects, these drugs can increase the chances of cancer - expensive - doesnt always work
vena cava, blood enters into right atrium down through a valve into right ventricle up and to the lungs via pulmonary artery back into the heart via pulmonary vein into the left atrium into the left ventricle aorta pumps blood to the body Vena Cava Atrium Ventricle Artery Vein Atrium Ventricle Aorta left side has a much bigger muscle because i needs to pump blood into the entire body whilst the right side only needs to pump blood to the lungs veins usually carry de-oxygenated blood except for the pulmonary vein which carries oxygenated blood into the heart arteries usually carry oxygenated blood except for the pulmonary artery which carries blood
de-oxygenated blood from the heart to the lungs red blood cells have no nuclei and a large surface area so they have more space to carry oxygen white bloods cells are apart of the immune system platelets are fragments of cells and are important for clotting. arteries -thick walls to carry high pressure -thin lumen capillaries: -one cell thick to allow for diffusion -usually connected in a mesh network in the gut and lungs so they have a large surface area veins: -have valves because they carry deoxygenated blood back to the heart -thin walls -thick lumen because they carry blood at low pressure
During transcription do you leave the last base letter from DNA out or do anything else with it other that just transcript it to mRNA. Because I’m revising in the ocr gateway biology textbook for my end of term test and in the book it has converted all bases to mRNA except the last one, in which it left ~ instead of U for uracil. Thanks
@@Primrose_Kitten yeah, been on study leave so past papers have been my saving grace. biology paper was GREAT, so have high expectations for the next ones.
Hi Jawaria, that is all ready and waiting for you!! All the revision videos are sorted into playlists... Ultimate Playlist with all the predictions, whole topic videos and quickfire questions are here ruclips.net/p/PL7O6CcKg0HaHZ0TcM5G2Zmdd7XuMCnSGP AQA Biology Playlist ruclips.net/p/PL7O6CcKg0HaGnykp12D8yVee_SEQdaEHH AQA Chemistry Playlist ruclips.net/p/PL7O6CcKg0HaGhn5E_LwNPH69bagsYQaJs AQA Physics Playlist ruclips.net/p/PL7O6CcKg0HaFYC_J92AxS1pfepJJK8kxt
Hi Daud, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide from my website www.primrosekitten.com/collections which has everything clearly laid out for you
Hi Hannah, making these videos takes a lot of time and effort, I do this so I can help as many students as possible achieve the best grade they can. I'm sorry you don't find my channel helpful. I struggle severely with dyslexia, this means writing such long videos, with long complicated words in, is extremely difficult for me. For more information on Dyslexia www.nhs.uk/conditions/dyslexia/ Full response ruclips.net/video/Q5Cl1xrz2EA/видео.html
Science and Maths by Primrose Kitten omg no i did not mean it in a rude way i swear!!! I am soooooooo grateful that u r making these videos, and honestly i think u deserve to become huge on youtube cuz these videos must take a lot of time to make. And of course the dyslexia must make it harder. Im so sorry that u took my comment the wrong way. I wish u the best of luck. Xxx
Hi heaven baxter, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide by signing up to my mailing list here mailchi.mp/161c4e43b8bf/primrosekitten and get workbooks from www.primrosekitten.com/collections which has everything clearly laid out for you
This is amazing.I didnt have a good teacher last year and I have mocks soon and this saved my life
sara mirza same I'm in yr 11
xylem
water in an upwards direction
from the roots to the leaves
phloem
ions and food in a downwards direction
leaves to the roots
bright light = more transpiration (more light means more photosynthesis which requires more water)
high temperature = more transpiration (rate of reaction happens faster)
high wind = more transpiration (wind brushes against the leaf and moves things out the way so diffusion can happen)
high humidity = less transpiration (water will struggle to move around due to the high water concentration in a humid atmosphere)
Thanks so much! This will help me alot tomorrow
tysm, I have my Biology mock tomorrow and I'm using this video to go over the topics I didn't quite understand
More people need to know about this!!!! so helpful, especially for the days before an exam
Biology exams tomorrow let's hope this works 🤞
not me watching this on the morning of the exams lmao
Did you do combined and what topics mainly came up on the papers?
@@at-focused1962 I did do combined but the exam was a year ago so I can't really remember, sorry about that😅
@@at-focused1962 we were given a list of what topics would definitely come up on the papers though, ask your teacher if they still have the list
@@litcherallyapotato3806 probs not I’m doing GCSEs in a week
Thank you so much, this is so helpful! I’m doing ocr combined science this year and there aren’t many videos on it. Could you please make more ocr ??
GOOD LUCK EVERYONE FROM A FELLOW CANDIDATE
I'm keeping all my fingers crossed for you, good luck Kathy !!
Thank you 🤭🤭
Thank you for this video. Just come out of the exam and I'm booming with confidence in the result 🫰🫰🙈
Lord plz help me with this exam, give me strength and help me answer these questions with ease
This has been so much help to me! Have mocks next week! Thank you sooo much!!!
This is one of the best science videos I have seen. Thanks so much.
Wow, thanks!
magnification = image height / object height
Thank you sooo much. Missed a lot because of lockdown and this really helped.
Man like awaale
xylem
water in an upwards direction
from the roots to the leaves
phloem
ions and food in a downwards direction
leaves to the roots
transpiration:
high te
ive got my gcses tomorrow
active transport . movement across a membrane from a low concentration to a high concentration
vena cava where blood enters
into right atrium
down through a valve into the right ventricle
up and into lungs via pulmonary artery
back into heart via pulmonary vein
into left atrium
then left ventricle
aorta pumps around the body
(V A V A V A V A)
valves prevent backflow
the left side has a much larger muscle as it must pump blood around the entire body whilst the right side only must pump blood to the lungs
red B.C have no nuclei and a larger surface area to carry more oxygen
white B.C are apart of the immune system
platelets are fragments of cells that are important for clotting
Arteries:
-thick walls as they carry blood under high pressure
-thin lumen
Capillaries:
-only one cell thick to allow for diffusion
-usually in found in a mesh like foundation in the gut and lungs for a large surface area
Veins:
-have valves
-thin walls
-thick lumen as they carry blood at low pressure
Lmao watching this the night before GCSEs 2023
I'm really hoping questions you love come up, good luck annalise
is this for combined and triple? Also u are an acc live saver i have my exams mock in less than 2 weeks for biology thank god i found ur channel
Hi itzsaif, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide by signing up to my mailing list here mailchi.mp/161c4e43b8bf/primrosekitten and get workbooks from www.primrosekitten.com/collections which has everything clearly laid out for you
vena cava where blood enters
into right atrium
down through a valve into the right ventricle
up and into lungs via pulmonary artery
back into heart via pulmonary vein
into left atrium
then left ventricle
aorta pumps around the body
(V A V A V A V A)
valves prevent backflow
the left side has a much larger muscle as it must pump blood around the entire body whilst the right side only must pump blood to the lungs
This is incredible, thank you!
Thanks so much! Very useful
pov watching this the day before my exam
You're not alone
Im watching The day of it 💀
This was me last yr fr
I'm 31 just gone back to college to do my maths and science gcses. I feel totally out of my depth 😩
how come?
the video was helpful but maybe sort out the sound quality and write down the stuff before the vid cuz it gets kinda slow whilst watching u write it all down
Trying to get my head around specifications - Is paper 1 Foundation or Higher Tier?
This was uploaded 3 years ago, is it okay to revise it for this year`s exams, please upload the latest video related to ocr combined science foundation, I have purchased predicted question plus sign for youtube gcse
Is this all we need to know for paper 1? does this video follow the specification for OCR J250?
Hi John Smith, this video is a short summary and can never cover everything in a much depth as you go into in class (full explanation ruclips.net/video/K6d4oOq-pmU/видео.html ) If you want to make sure you've covered all the bits you need then I suggest you watch this in combination with using my FREE revision guide available by signing up to my mailing list mailchi.mp/161c4e43b8bf/primrosekitten there are workbooks on my website www.primrosekitten.com/collections I've rewritten the specification and it clearly shows you everything you need to know.
how the heck did you know about the exam dates and topics in 2023 when you were in 2019 😮🤯
when will you put predicted papers on to your website for OCR and do we not need to know the parts of a microscope?
papers will be out in April!!
gcse is tomorrow inshallah ill get a 9😭
hi iman, good luck in your exam!!
thank you❤️❤️ hopefully I will haha
So helpful :)
is this the yr 11 mock paper they have to do in november
I hope so, I have it tommorow
@@selinaa19 Thanks, I just did it!
@@Dude-cf8hb was it the same paper?
@@Dude-cf8hb What came up? Was it the 2019 paper?
Biology exam starts today at 9:00
Can u do 21st century please
can i use this for foundation
lol
ivf
advantages:
u get a baby
disadvantages:
- must take many drugs for a long time which include bad side effects
- long term side effects, these drugs can increase the chances of cancer
- expensive
- doesnt always work
Bio tomorrow woo
Hi Pratyasha Mohanty, good luck for tomorrow, I hope all the good questions come up for you!
@@Primrose_Kitten Thank you! Thank you for all your help as well xx
vena cava, blood enters
into right atrium
down through a valve into right ventricle
up and to the lungs via pulmonary artery
back into the heart via pulmonary vein
into the left atrium
into the left ventricle
aorta pumps blood to the body
Vena Cava
Atrium
Ventricle
Artery
Vein
Atrium
Ventricle Aorta
left side has a much bigger muscle because i needs to pump blood into the entire body whilst the right side only needs to pump blood to the lungs
veins usually carry de-oxygenated blood except for the pulmonary vein which carries oxygenated blood into the heart
arteries usually carry oxygenated blood except for the pulmonary artery which carries blood
de-oxygenated blood from the heart to the lungs
red blood cells have no nuclei and a large surface area so they have more space to carry oxygen
white bloods cells are apart of the immune system
platelets are fragments of cells and are important for clotting.
arteries
-thick walls to carry high pressure
-thin lumen
capillaries:
-one cell thick to allow for diffusion
-usually connected in a mesh network in the gut and lungs so they have a large surface area
veins:
-have valves because they carry deoxygenated blood back to the heart
-thin walls
-thick lumen because they carry blood at low pressure
bio mock exam in less than 9 hours pray fa me
when will ocr science predicted papers be on your website
2020 predictions will all get released in april, but workbooks should be up within a couple of months
why did I not find this before my mocks .....
what ended up being on it?
@@taetae8494 everything she said pretty much
@@johngrose3389 do you remember what practicals you had to write about?
@@taetae8494 honestly can't remember there was a 6 marker on one of them
Does anyone have the time stamps I’m too lazy for that lol
During transcription do you leave the last base letter from DNA out or do anything else with it other that just transcript it to mRNA. Because I’m revising in the ocr gateway biology textbook for my end of term test and in the book it has converted all bases to mRNA except the last one, in which it left ~ instead of U for uracil.
Thanks
I would say that the ~ was substitute for saying 'and so on', 'etc.' I'm not a professional though
Energy 100
for future videos can you add time stamps in the video (i know its in the comments) also could you go over a biology past paper
Hello ahyan
@@ik-zn2hk hello do i know you?
Yh , we have the same BRILLIANT science teacher who taught us very well and in depth.
@@ik-zn2hk oh its ibrahim khan
what about for OCR gateway the predicted papers
All 2020 predicted papers (inc. OCR) will be released in April
morning of the bio exam pray for me
39:20
exam is in 4 days, am i cooked?
Keep it low-key with quizzes and flashcards in the couple of days before. Any bigger questions you're worried about, speak to your teachers too!
@@Primrose_Kitten yeah, been on study leave so past papers have been my saving grace. biology paper was GREAT, so have high expectations for the next ones.
has anyone found the checklists?
can you do aqa please?
Jawaria Khurshid she already has.
Hi Jawaria, that is all ready and waiting for you!!
All the revision videos are sorted into playlists...
Ultimate Playlist with all the predictions, whole topic videos and quickfire questions are here ruclips.net/p/PL7O6CcKg0HaHZ0TcM5G2Zmdd7XuMCnSGP
AQA Biology Playlist ruclips.net/p/PL7O6CcKg0HaGnykp12D8yVee_SEQdaEHH
AQA Chemistry Playlist ruclips.net/p/PL7O6CcKg0HaGhn5E_LwNPH69bagsYQaJs
AQA Physics Playlist ruclips.net/p/PL7O6CcKg0HaFYC_J92AxS1pfepJJK8kxt
2 am of the day of exam and still haven’t revised and don’t know anything
🙏
if I'm doing triple what else do I need to know
Hi Daud, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide from my website www.primrosekitten.com/collections which has everything clearly laid out for you
53:36 you spelt hairs lie flat wrong 😂
Hi Hannah, making these videos takes a lot of time and effort, I do this so I can help as many students as possible achieve the best grade they can. I'm sorry you don't find my channel helpful. I struggle severely with dyslexia, this means writing such long videos, with long complicated words in, is extremely difficult for me.
For more information on Dyslexia www.nhs.uk/conditions/dyslexia/
Full response ruclips.net/video/Q5Cl1xrz2EA/видео.html
Science and Maths by Primrose Kitten omg no i did not mean it in a rude way i swear!!! I am soooooooo grateful that u r making these videos, and honestly i think u deserve to become huge on youtube cuz these videos must take a lot of time to make. And of course the dyslexia must make it harder. Im so sorry that u took my comment the wrong way. I wish u the best of luck. Xxx
mocks tomorrow wish me luck 😫
1 week
Tomorrow
By paper 1 does it mean B1?
no b1 b2 and b3
will this work for higher paper aswell
Hi heaven baxter, this covers both the content for combined science and separate science at both foundation and higher tier. If you're not sure which bit is which then I suggest you get my FREE revision guide by signing up to my mailing list here mailchi.mp/161c4e43b8bf/primrosekitten and get workbooks from www.primrosekitten.com/collections which has everything clearly laid out for you
ur amazing lysm
i have mocks in 3 days lol
Lol my exam is in a few hours 🫡
Good luck!!
@@Primrose_Kittenthank you 🫶
O
In 2 hours everyone
Good luck!!
@@Primrose_Kitten less than an hour now, thank you! Used your resources for the past year now.