Water transport in plants

[THEREDNECKRYAN]

I find this video extremley easy to masterbate to, is that weird?

[badboywan]

nice



[5razor]

do you have the excerpt for sap transport?

[navyman4]

HE'S LIKE A wise grandfather...

[mithilag]

That computer-generated visual dem. was brilliant!

[Meurglys33]

I knew all of this from textbooks. Seeing it (albeit in CGI) is something else.

[JWTownhill]

Cheers, helped me with my biology homework where the text-book could not =D

[themightyfrench]

@JWTownhill you use this for science lol 

[osirisseventh1]

For the real explanation of fluid transport google Andrew K Fletcher He has identified a simple mechanism of evaporation altering the density of sap at the leaves, this causes water to flow both down and up the tree. The denser sap flows down and the less dense sap flows up. Makes more sense than this "lack of explanation" His experiments can be found on youtube

[jaygrizzles]

@osirisseventh1 From the guy who brought you "Inverted Bed Therapy"

[Degazio]

Awesome vid, sure he never says "xylem" for the tubes transporting water, but the 3D modeling is wicked for describing transport if you already have a general understanding. :)

[stupidstickmen84]

this video is fucking stupid, he doesnt explain any biological terms or what the "tubes" are even called

[Tubarc]

Water moves upward inside the plant by Unsaturated Hydraulic Flow and not Saturated one by pumping. I measured 2.18 mm/s on artificial porosity which easily can provide water as required to large plants (US Pat. 6,766,817)

[Tubarc]

Water moves upward inside the plant by Unsaturated Hydraulic Flow and not Saturated one by pumping. I measured 2.18 mm/s on artificial porosity which easily can provide water as required to large plants (US Pat. 6,766,817)

[jimmytwothousandand]

his shows are relaxing an informing

[veronicachic]

i love this guy

[whoisonline112]

david rocks

[shinymetalbracket]

I have to watch this video for my Botany class...

[woodgrain89]

fuckin nigga

[teamblast1]

lol neither do i

[MrDummyu]

I dun want to remove the comments. hahahahahaha

[MrDummyu]

funky. u noob lah

[teamblast1]

fine guys its interesting

[jx826]

so lame.. jacob ltr we 2v2 ppl

[jx826]

i mean science

[jx826]

i love scinece

[teamblast1]

o rly?

[guitaristkcw]

haha i love science

[teamblast1]

..........zzzz interestingly boring

[FunkyZangel]

lame.. you are not the only one with a account .

[biomari100]

In português.... please!!!!!!!!!!!!!!!!

[juststl]

i looove this shit

[tzaiwei]

science shit.

[huertasxomin]

in spanish please!!!...hahaha

[LT1254]

the water doesn't move up the tree because its replacing water lost

the water at the top evaporates to create a gradient which drags the water from the roots up to carry nutrients up the tree that it needs to feed

[medoforsex]

Compare ? water loss in virus-infected plant compared to normal plants?

if any one have any idea please help me

thanks

[Only1moomin]

To find out how water really reaches the leaves of a tree. Google andrew k fletcher. A scientist from the uk claims gravity is lifting the water up the tree because evaporation at the leaves makes the sap heavy and gravity pulls it down. The falling heavy sap generates a tension in the sap causing dilute fluid to be lifted in the xylem,The tension is also applied to the water in the soil causing it to be pulled into the tree diluting any sap at the root to make it less dense so it can rise again

[MorkMacey]

The man in the film is called David Attenborough, he is a groudbreaking broadcaster and respected biologist.His documentaries are legendary.

[vilengw]

their roots look like worms!

[mourningreaper]

thanks for this~!

btw, is that person a biologist in the video?

[ababastingababa]

Thank you for all that information about xylem and phloem. That helps me as I am in a plant science class, and I am trying to understand all that. Thanks again!

[aussie006]

mate stop wasting water

[401198]

THANKS DR. NAGEL =)))

[gibcote]

Amazing!!! Thanks a zillion!!

[wloszakowice]

człowiek jest absolutnie fantastyczny~!

[merreee]

this is COOL :):)

[beerdog101]

Just to let people know, the water pipes are called "xylem" and the pipes transporting nutrients are called "phloem".

Very good video, thanks.

[Mergandevinasander]

Not entirely accurate. They're both carried in each kind. The difference is solely that xylem carries it upwards, whereas phloem return wastes to the soil, flowing downward.

[phytoman007]

No, sorry, but this comment is not quite right. Phloem is mainly a long-distance sugar transport system that moves the sugary fluid both up and down the stem, depending on demand. Xylem generally moves water up the stem, from the roots to the leaves.

[Mergandevinasander]

Agreed, there is more to it, but I was loath to go too deep into the entire thing. Essentially, both xylem and phloem are continous streams of mostly dead cells, perforated in such a fashion that capillary action draws their contents either upward or downward as needed. They, being dead and empty, have no "active" role at all. Water is drawn skyward to make up for that which evaporates. The sugars produced by photosynthesis in turn head downward, in part to feed mutualistic fungal symbiotes...

[Mergandevinasander]

Of course, to just stick that in originally, seemed a bit windy. As a point, this system only exists in some plants (most decent sized ones, but not all by any means) Gymno- and Angiosperms to be precise...

[wazza1818]

Very usefull, thanks