Photosynthesis and Cellular Respiration: Crash Course Botany #5

Plants and trees may seem pretty passive, but behind the scenes, their cells are working hard to put on a magic show. In this episode of Crash Course Botany, we’ll explore how the processes of photosynthesis and cellular respiration work, why they’re so critical for all life on Earth, and how they’re helping us to forge a greener path to the future.

Chapters:
Plants' Magic Show 00:00
Photosynthesis 1:27
The Light-Dependent Reactions 3:02
The Light-Independent Reactions 4:18
Cellular Respiration 5:32
Biofuels 8:50
Review & Credits 11:43

Special thanks to Hannah Bodenhausen for additional post-production support on this episode!

Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:
David Fanska, Andrew Woods, Tawny Whaley, Sean Saunders, Katie, DL Singfield, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Kyle & Katherine Callahan, Laurel Stevens, Burt Humburg, Aziz Y, Perry Joyce, Scott Harrison, Mark & Susan Billian, Alan Bridgeman, Rachel Creager, Breanna Bosso, Matt Curls, Jennifer Killen, Jon Allen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Eric Koslow, Indija-ka Siriwardena, Jason Rostoker, Siobhán, Ken Penttinen, Nathan Taylor, Les Aker, William McGraw, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Pineapples of Solidarity, Katie Dean, Stephen McCandless, Wai Jack Sin, Ian Dundore, Mark, Caleb Weeks.
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[crashcourse]

The answer to the extra credit question is… bacteria! What’s another fact that makes you realize the smallness of humans?

[BlackForager]

THOUGHT CAFE MADE THE LIL MITOCHONDRIA SO CUTE 😭

[emeraldhouseplants]

I’m currently at university majoring in plant science. I wish all my lectures were like this! So engaging and love the graphics.

[turingtestflunker]

As a Trigun fan, I can assure you that you are DEFINITELY NOT the only person plotting elaborate plant fanfiction.

[Beryllahawk]

One of the better explanations I've heard for this one, well done! I suppose some folks might feel they've heard this story before, but still it's WELL stated, and that counts for a lot!
That cape is very stylish, by the way, hehe!

[fayem]

I had three uni courses on plants but i still see this with graphs and i am WOW ALL OVER AGAIN

[datatheandroid]

Thank you, I always use your videos to prepare lessons for the botanical garden ❤

[BiziCutherell]

This finally got me to understand why photosynthesis and cellular respiration are different. Ready for my test now!

[lucas-]

You're the brightest person out there ☀️🪴🌿🌵🌱🌷

[christinasornbutnark]

This is my favorite episode. Thank you so much for lowering her voice a lil. It made it easier for me to watch/listen & I really appreciate that 😊

[HumanThePerson]

I love listen to their biology videos when cleaning as a brush up

[nettlesandsnakes]

Don’t think you are the only one who writes elaborate botany fan fictions, I do too.

I’ve made an entire world known as snorin, when plants are purple instead of green.

There are a lot more similarities between snorin and Mars than snorin in earth, but it’s still very wet there.

[thebusybastard]

This is great for helping a Social Sciences guy like me understand these concepts for my classes in harder sciences. Thank You!

[clairehohl]

such an amazing and informative video!! i love plants and learning everything about them :))

[tramseyer]

Biofuels and related are fascinating. Thank you!

[fayem]

Thank you so so much for this series!! You are an amazing host girl!

[michaeltalaganis]

Either algae or fungi make up the next largest group. Great video, informative as always. Keep up the great work, you are amazing Alexis!!!!

[SciEdSusan]

At 8:27, you label the processes "anaerobic respiration", while the diagram calls them fermentation. The diagram is right! Anaerobic respiration is very different & requires the electron transport chain. Fermentation starts with sugars like glucose and is definitely what plants do!

[Bluesmudge]

You are fantastic!! Thank you for your enthusiasm!!!

[FairMiles]

11:19 Problem with the "magic" of biofuels is that mass-producing them is heavily dependent on fossil fuels. So we are still, though indirectly, burning fossil fuels and increasing CO2 levels…