Venation of leaf
HTML-код
- Опубликовано: 26 окт 2024
- Follow us on / 7activestudio
For more information:
www.7activestud...
info@7activestudio.com
Contact: +91- 9700061777, 040-66564777
7 Active Technology Solutions Pvt. Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc. 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use.
VENATION:
The method of arrangement of veins and veinlets in the leaf lamina of the leaf is called Venation.
Venation provides definite shape and strength to the leaf lamina
It also concerned in the expansion of the leaf lamina to get sufficient amount of sunlight.
It helps in transportation of water, minerals and food materials.
TYPES OF VENATION:
In angiosperms venation is of two types.
They are 1. Reticulate venation and 2.Parallel venation.
RETICULATE VENATION:
Presence of all veins in the leaf lamina in the form a net work is called Reticulate venation.
It is found mainly in dicots.
The monocots with reticulate venation are Smilax, Dioscorea.
Based on the number of mid ribs, reticulate venation is of two types,
aPinnate reticulate and b Palmate reticulate venation.
PINNATE RETICULATE VENATION:
In the leaf lamina, only one midrib is present, all the veins are present in the form of a net work is called PINNATE RETICULATE VENATION.
It is also called UNICOSTATE RETICULATE VENATION.
It is the most common type of venation.
Example: Mangifera.
PALMATE RETICUALTE VENATION:
In the leaflamina, morethan one midrib is present, all the veins are arranged in the form of net work, is called PALMATE RETICULATE VENATION.
It is also called MULTICOSTATE RETICULATE VENATION.
It is classified into two types
1 Convergent and 2 Divergent.
1CONVERGENT -- The leaf lamina is unlobbed, all the mid veins are run throughout the leaf lamina and meet at the apex.
Example: Ziziphus.
2DIVERGENT -- The leaf lamina is lobbed, all the mid veins enter into respective lobes.
Examples: Passiflora, Gossypium, Cucurbita
PARALLEL VENATION:
Arrangement of all veins in the leaf lamina parallel with one another is called PARALLEL VENATION
It is mainly found in monocotyledons.
The dicots with parallel venation are Eryngium, Caulophyllum.
Based on the number of mid veins, parallel venation is of two types,
1 Pinnate parallel venation and 2 Palmate parallel venation.
PINNATE PARALLEL VENATION:
In the leaf lamina, only one mid vein is present from base to apex, and many parallel veins are produced towards the margins.
It is also called UNICOSTATE PARALLEL VENATION.
Example: Musa paradisiaca.
PALMATE PARALLEL VENATION:
In the leaf many prominent veins are present, and are parallel with one another, is called PALMATE PARALLEL VENATION.
It is also called MULTICOSTATE PARALLEL VENATION.
It is classified into two types:
CONVERGENT --The leaf lamina is unlobbed, all the midveins arise from the basal part, run parallel to each other and unite at the apex.
It is found in the family POACEAE.
Example: Oryza sativa.
DIVERGENT -- The leaf lamina is lobbed, all the veins arise from the base and enterinto the lobes separately.
Thank u very much , this helps me a lot..... ❤ once again thank u 🙏
Glad to hear that
Animation make things better to understand
Neat and Brief Video...Kudos to your Crew ! Thanks a lot.
Thank you🙏
I got a lot of information from this video.
Amazing and understanding.
Very useful nd important information tq👍
It is very useful for me. Thank you. 😇😇😇
thank you so much, this helped me a lot. my lab manual is incomplete, so I search for other sources.
Thank you I am searching for what is venation other versions are not good your vedio is good thank you again thanks
Thanks for your support Parvathi.
Leo has hair
thx for helping, cuz it was last min help in exams.U_U
This is best way to understand to us and thanks
Best explain
It was super helpful
Thank you sir
Very helpful
Very useful and important information about leaf.
Your this video is super 😃😃
If it is right please
👇
Neat
Thank You so much sir
Thank you
Nice
Very useful and helpful information 😀😀
What kind of venation is present in spinach , cabbage, coriander, mint leaves, and curry leaf , waiting for your answer , thank you
Thank you sir 😊👍 I have learnt many things
Thank you sir
STATUTORY WARNING XD lol that part killed me.
So useful in project work and very nice
It's very nice 😊😊
Thanks
👌👌
Very useful👍👍
Good video
Supper
Best information thanks 😆😆
very nice
it is the best explanation whoa it really gave me a helping hand in my exams
Please what is the meaning of parallel vein
Very nice vedio please make a one more vedio of biology
Very good information it helped me in exam tq
this is the best video to understand venation
thankyou you really explained it will but can i ask u have ppt for this?
Very helpful video, everything is explained very clear and understandable BUT I can't avoid saying that the names of the taxa and species should have been pronounced in latin and not in English :P
Thanx for compliment.
visit www.sciencetuts.com
sarantis1995
Thanks for this explains
It helped a lot in my grand-daughter's project
Thank you for appreciate... 👍
NO ONE CARES!!1! 🤣🤣🤣🤣🤣🤣😂😂
Amazing & nice... 😊😊
Very nice video
Thanks for uploading this video
super ............. awesome explanation
Thanks for the video
Nice sir
Very easily and helpful 😀😀
Glad you think so!
Thanku sir I am tarunadithiya
👍️👍️👍️👍️👍️👍️
by the way the spelling of arrangement is wrong in this video somewhere
Very useful from this vedio we can understand many things
thanx this video really help me
Owo mesmerising video
Good job 😊😊😊
very helpful keep it up
Amazing I understand well
Nice explanation...
Very helpful video
Thank you🌹🌹
It is the best explanation
Thanks 😊
it is too good information....very nice..
I'm here because I am curious
I can't understand
Leannon Canyon
👍👍
greatly helped :) keep uploading :)
McGlynn Squares
very nice as usual
Access 1500+ Videos of Digital Content. Online Visual Learning Portal for @
Nihla salam
Lynn Isle
👍👍👍👍
Very smart😅😅😅😅😅😅😅
thank you for explaning the process of venation
THANK Q SIR👍️👍️FOR WATCHING THIS VIDEO😅.
than you very much sir
he Allah aj hm sb ka paper acha ho jaye ameen
Mango venation
Yes
Nice explanation for me
Use ful information..👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻❤
very good explanation
Useful information
Access 1500+ Videos of Digital Content. Online Visual Learning Portal for @
Better.
Malayalikal arengilum undo?
very good presentation
gautama parida thank it is useful information
What thank you not told about lady finger leaves venation
Thanks mam
Leaves ka structure samaj nhi aaya
Hlo
Thank
very easily understand
Ok
Thanks 😀😀
Was
Speak in Hindi
Sorry I didn't understand. 🤒
Nonsense she is my ma'am.
Akshay kumar sahoo now on words don't use this words on social media.
Wohtah