Structure Of The Leaf | Plant | Biology | The FuseSchool

Share this & earn $10
FuseSchool - Global Education
Published at : 11 Dec 2020
676191 views
5524
295

Structure Of The Leaf | Plant | Biology | The FuseSchool

Plants make food through photosynthesis. Using their leaves, plants combine sunlight, carbon dioxide and water to make glucose and oxygen. A leaf is like a plant's food factory, collecting all of the components into one place so that photosynthesis can happen.

Let's start with sunlight. The top of a leaf is exposed to the most sunlight, and so the cells specialised for trapping light are on top of the leaf. These specialised cells are called palisade mesophyll cells. They are packed full of chlorophyll - the green chemical that plants used to absorb light. Most leaves have a large surface area so that they can trap as much sunlight as possible.

Moving onto carbon dioxide. This is where the bottom of the leaf comes in. There are little pores on the bottom of the leaf called stomata. The stomata open up so that carbon dioxide can diffuse into the leaf. The stomata are controlled by 'sausage shaped' guard cells, which open up to let carbon dioxide in. The guard cells can also close the stomata, to stop other things inside the leaf, like water, from escaping.

The carbon dioxide comes in from the stomata, and then makes its way up through the leaf, through the gaps in the spongy mesophyll layer in the bottom part of the leaf and heads up to the palisade cells where photosynthesis occurs. Leaves are thin so that the carbon dioxide doesn't have too far to travel.

The final reactant needed for photosynthesis is water. Water comes into the plant through the roots, moves up the stem and enters the leaf through the vascular bundle. The vascular bundle contains a hollow tube specifically for water movement called the xylem. The veins on a leaf are actually the vascular bundle, allowing water to be spread out through the leaf.

The leaves palisade cells now have sunlight, carbon dioxide and water. They are ready to photosynthesis to make glucose and oxygen.

How do leaves manage to let in the wanted things (like water and carbon dioxide) but prevent unwanted things like bacteria getting in and also prevent the reactants from escaping before being used? At the top and bottom of the leaf are epidermis cells. These produce a protective waxy cuticle layer. The waxy cuticle seals up the leaf so that the only way in and out are through the stomata, which are regulated by the guard cells.

So from top to bottom, a leaf's structure:
- Waxy cuticle and epidermis cells
- Palisade cells (where photosynthesis occurs)
- Spongy mesophyll (with vascular bundle running through for water transport)
- Epidermis and cuticle, with stomata and guard cells spread throughout (allowing carbon dioxide in).



SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.

VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.

These videos can be used in a flipped classroom model or as a revision aid.

Find all of our Chemistry videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV

Find all of our Biology videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0

Find all of our Physics videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlTWm6Sr5uN2Uv5TXHiZUq8b

Find all of our Maths videos here: https://www.youtube.com/playlist?list=PLW0gavSzhMlTKBNbHH5u1SNnsrOaacKLu

Instagram: https://www.instagram.com/fuseschool/
Facebook: https://www.facebook.com/fuseschool/
Twitter: https://twitter.com/fuseSchool

Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org
Follow us: http://www.youtube.com/fuseschool
Befriend us: http://www.facebook.com/fuseschool

This is an Open Educational Resource. If you would like to use the video, please contact us: info@fuseschool.org
the virtual schoolhomeworkstudents

Which tech company started out selling seafood?

Which tech company started out selling seafood?

Challenging Islamic Law

Challenging Islamic Law

Trapping a Grandmaster in 7 Moves | Stafford Gambit

Trapping a Grandmaster in 7 Moves | Stafford Gambit

Hat Giveaway... and that's all...

Hat Giveaway... and that's all...

Satisfying Chateau Restorations | Escape to the Chateau: DIY

Satisfying Chateau Restorations | Escape to the Chateau: DIY

Mitch McConnell Gets Clobbered In Debate

Mitch McConnell Gets Clobbered In Debate

Flying Fat and Weird Cookies to Summer Shredding - The Sweet Life Ep. 16

Flying Fat and Weird Cookies to Summer Shredding - The Sweet Life Ep. 16

Jordan Peterson - Dealing With a Difficult Past and Feeling Lost

Jordan Peterson - Dealing With a Difficult Past and Feeling Lost

✅ YES  ✅ 6x6 PAPER | Cute Teeny 4 Piece Happy Mail Idea Pack | Junk Journal Inserts | NO Scoreboard

✅ YES ✅ 6x6 PAPER | Cute Teeny 4 Piece Happy Mail Idea Pack | Junk Journal Inserts | NO Scoreboard

The Beatles - "Yesterday" live in Munich, 1966

The Beatles - "Yesterday" live in Munich, 1966

To the Beginning ~English Lyrics

To the Beginning ~English Lyrics

Spotemgottem "Unfortunate" (WSHH Exclusive - Official Music Video)

Spotemgottem "Unfortunate" (WSHH Exclusive - Official Music Video)

LITTLE BIG x TOMMY CASH — GIVE ME YOUR MONEY (live)

LITTLE BIG x TOMMY CASH — GIVE ME YOUR MONEY (live)

21 Savage & J. Cole’s “A Lot” Explained | Song Stories

21 Savage & J. Cole’s “A Lot” Explained | Song Stories

FINALLY! SECOND STIMULUS CHECK GETS BIGGER AMOUNT! | Second Stimulus Package Update GREAT NEWS TODAY

FINALLY! SECOND STIMULUS CHECK GETS BIGGER AMOUNT! | Second Stimulus Package Update GREAT NEWS TODAY

Drake - Dreams Money Can Buy

Drake - Dreams Money Can Buy

RAYELLE "Let Loose"

RAYELLE "Let Loose"

Grieks taalcursus 100 LESSEN

Grieks taalcursus 100 LESSEN

Bold - Bi Odoo Ch Hairtai (Lyrics)

Bold - Bi Odoo Ch Hairtai (Lyrics)

RUSSIAN SHOPS UPDATE: My Favorite Chips (Crisps) and Vegan Food Department

RUSSIAN SHOPS UPDATE: My Favorite Chips (Crisps) and Vegan Food Department

To Defy the Laws of Tradition

To Defy the Laws of Tradition

Forever And Ever (Original GLMM)

Forever And Ever (Original GLMM)

Revel Rail Review - 2020 Bible of Bike Tests

Revel Rail Review - 2020 Bible of Bike Tests

Best Streaming Device of 2020 (HONEST REVIEW) - Apple TV vs Roku vs Fire TV vs Chromecast

Best Streaming Device of 2020 (HONEST REVIEW) - Apple TV vs Roku vs Fire TV vs Chromecast

Art with no money

Art with no money

Guild Wars 2: Tangled Paths Achievement Guide

Guild Wars 2: Tangled Paths Achievement Guide

A Great Big World - Land of Opportunity (audio)

A Great Big World - Land of Opportunity (audio)

most definitely probably going to be this one...

most definitely probably going to be this one...

TOP MEJORES TABLETS para la escuela 2020 🔥   [Calidad-Precio]

TOP MEJORES TABLETS para la escuela 2020 🔥 [Calidad-Precio]

Logic - Confessions of a Dangerous Mind (Official Video)

Logic - Confessions of a Dangerous Mind (Official Video)

Hot vs Cold Challenge / Mermaid on Fire vs Icy Mermaid

Hot vs Cold Challenge / Mermaid on Fire vs Icy Mermaid

Dark Mode in Facebook || How to enable Dark Mode in Any App Samsung M21

Dark Mode in Facebook || How to enable Dark Mode in Any App Samsung M21

Recording and Mixing an Acoustic Guitar

Recording and Mixing an Acoustic Guitar

The BEST Budget MacBook Alternative/Laptop for College Students (2020)

The BEST Budget MacBook Alternative/Laptop for College Students (2020)

CARBS vs FATS (Major PRACTICAL Benefits and Drawbacks of Each in Your Diet)

CARBS vs FATS (Major PRACTICAL Benefits and Drawbacks of Each in Your Diet)

Trivium - No Way to Heal (Audio)

Trivium - No Way to Heal (Audio)

2b2t - The History of the +X Diggers

2b2t - The History of the +X Diggers

it's ok | this song will make you cry

it's ok | this song will make you cry

Juice WRLD & The Kid Laroi - Reminds Me Of You (Official Lyric Video)

Juice WRLD & The Kid Laroi - Reminds Me Of You (Official Lyric Video)

Sam and Dean II I am proud of us (15x20)

Sam and Dean II I am proud of us (15x20)

How To Convey To A Guy You're A Catch WITHOUT Sounding Conceited | Ask Mark #72

How To Convey To A Guy You're A Catch WITHOUT Sounding Conceited | Ask Mark #72

Trump Can't Install Himself as President, But His Actual Goal May Be Immunity From Prosecution

Trump Can't Install Himself as President, But His Actual Goal May Be Immunity From Prosecution

How an ancient Indian practice is gaining popularity

How an ancient Indian practice is gaining popularity

5 Facts About Twenty Fifth Bam - Tower Of God/Kami no Tou

5 Facts About Twenty Fifth Bam - Tower Of God/Kami no Tou

Blvds of Splendor

Blvds of Splendor

Math 9th Class Guess Paper 2021

Math 9th Class Guess Paper 2021

How to become a Surgeon in the UK : My Core Surgical Training Journey

How to become a Surgeon in the UK : My Core Surgical Training Journey

Road to profit series #1- Interview with a profitable Betfair trader

Road to profit series #1- Interview with a profitable Betfair trader

Cheese! Today we Taste a Variety of Cheese from Switzerland, Italy, Oregon, France, Vermont + Texas

Cheese! Today we Taste a Variety of Cheese from Switzerland, Italy, Oregon, France, Vermont + Texas