Transport in Plants: The Xylem | A-level Biology | OCR, AQA, Edexcel
Transport in Plants: The Xylem in a Snap! Unlock the full A-level Biology course at bit.ly/2uZFSUE created by Adam Tildesley, Biology expert at SnapRevise and graduate of Cambridge University.
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The key points covered of this video include:
1. Structure of the Xylem
2. Formation of Xylem
3. Adaptations of Xylem to its Function
Structure of the Xylem
Xylem vessels are dead cells stacked end-to-end. Xylem cells have no cell walls at their ends that would slow the flow of water. Xylem cells are lined with a waterproof coat made of the polysaccharide lignin. In a vascular bundle xylem vessels are continuous hollow tubes that run through the plant.
Formation of Xylem Vessels
Immature xylem vessels are waterproofed when lignin is deposited on the inside of their cell walls. This process of lignification kills the cells and allows for maximum flow of water through the hollow tubes.
Adaptations of the Xylem
There are holes in the xylem with no lignification - these are called bordered pits. The vessels are narrow enough to ensure that water travels upwards in an unbroken column. There are no end walls or organelles to impede water flow
Summary
Plants have different transport requirements for different substances
Xylem transports water and mineral ions from the roots upwards
Phloem transports assimilates up and down the plant
Xylem vessels are formed from the lignification of early xylem cells
Xylem vessels are well adapted to transporting water
Incomplete lignification
Bordered pits
Narrow vessels
No cytoplasm or cell contents
Пікірлер: 60
Our teacher forgot to tell us that xylem adaptation and formation part etc. but I understood it from you in only 8 mins omg I wish you were my teacher to have an A*
@vii6429
2 жыл бұрын
i personally find him rlly boring. like our school got us the paid version of snap revise and i havent used it once bc i have to sit through this guy talking and i literally cant, like my brain just starts daydreaming-- idk why i clicked on his video just now lmao
@aarizmushtaq4301
Жыл бұрын
@@vii6429 focusssss
The superb explanation ! 🙏
Thank you sir you are making it a walk in the park right now
what software/site did you use to make these videos?
Thank you this was wonderful !
Thanks for the educational video!!!
@snaprevise
3 жыл бұрын
You're welcome! Glad you liked it!
That's superb😱🙌🏾
does this complete as biology transport in plants?
What about stuff like Parenchyma and Tracheids
Wonderful! I enjoyed this!
@sirfmgamer5655
4 жыл бұрын
It's good for memory retention!
@snaprevise
3 жыл бұрын
Thanks! Glad you enjoyed the video! 😊
thanks!
@snaprevise
3 жыл бұрын
You're welcome!
Please add a video on tracheids
Good one
Thanks Sir
Thanks 😊
@ekenjehmuke-hq3gj
4 ай бұрын
😊
ur a hero
As an o level student thanks
Amazing video (clap...clap...clap...) thank you
@snaprevise
3 жыл бұрын
Thank you too! Glad you enjoyed it!
Is lignin a polysaccharide? Doesn't it end with -in? So wouldn't it be a protein?
@raedalderhalli1497
4 жыл бұрын
En
@manasgaur7897
4 жыл бұрын
Rex Tuturials Oh ok thanks, that sort of confused me
@alexeikramarenko2052
4 жыл бұрын
You are very right Manas. Lignin is a polyaromatic amorphous biopolymer. Cellulose and hemicellulose are polysaccharides composed by monomeric sugars such as glucose, xylose mainly
@manasgaur7897
4 жыл бұрын
Alexei Kramarenko lol thanks, are you into medicine or something?
@MohidPvE
3 жыл бұрын
@@alexeikramarenko2052 bruh
Good!!
@snaprevise
3 жыл бұрын
Thank you! Cheers!
Is this enough detail?
Need more teacher
wouldnt want to be a plant cell lol
@giornogiovanna3139
3 жыл бұрын
being a human is not any better.
@Dannieladey
2 жыл бұрын
Giorno Giovanna depressed already?
@fluffywanheda4949
2 жыл бұрын
Imagine being a xylem cell just dead actually no imagine being a lung just a lung aka insects
@eems4565
Жыл бұрын
@@giornogiovanna3139 outta the options between a plant and a human, i think id take the plant tbh 💀
@harry011984
Жыл бұрын
Better than my life over the last 30 years. Our society makes us sick. You heard it here first. Imagine in the 21st century and buying a jar of this weird yellow organism that goes on your skin and has been there for 8 years and doctors and dermatologists saying nothing is there. Imagine that?!
It would be nice if tracheids were also mentioned.
@jaskiratsingh7922
2 жыл бұрын
It is not in the Alevel Bio spec so there is no point...
Can someone please explain this to me as simply as possible I’m only in yr 8 and I don’t get it at all
@tariromudyazvivi1957
3 жыл бұрын
In the simplest way I can describe it: Xylem vessels are transport tissue found in the plant stems . They mainly carry water and minerals around the plant. They are dead cells and so they don't have any of the usual cell organelles which makes them hollow and leave more room for the water and minerals to move uninterrupted and efficiently. There is a bit more to it but I think this could just help you grasp it although since you're in year 8 I would advise you to maybe check out an IGCSE level resource. Hope this helps! ^^
@eems4565
Жыл бұрын
bro u dont need to know none of this shit 😭 u aint even at gcse yet
"FROM EVOLUTIONIST TO CREATIONIST" BY PROFESSOR WALTER VEITH BEAUTIFUL TRUE AMAZING POWERFUL STORY FROM SOUTH AFRICA ENJOY YOU TUBE ENJOY BEAUTIFUL WATCH 🙏🏾😃💯❤️
the xylem looking ddisgusting
Trypophobia trigger warning
@yabombo8145
2 жыл бұрын
shut it g
thanks!
@snaprevise
3 жыл бұрын
You bet! 😎