Photosynthesis: Crash Course Biology #8

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Hank explains the extremely complex series of reactions whereby plants feed themselves on sunlight, carbon dioxide and water, and also create some by products we’re pretty fond of as well.

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This video uses sounds from, a list of which can be found, along with the CITATIONS for this episode, in the Google document here:

Table of Contents:
1) Water 1:16
2) Carbon Dioxide 1:32
3) Sunlight/Photons 1:43
4) Chloroplasts 1:57
5) Light Reaction/Light-Dependent 2:42
a. Photosystem II 3:33
b. Cytochrome Complex 5:54
c. ATP Synthase 6:16
d. Photosystem I 7:06
6) Dark Reactions/Light-Independent 7:55
a. Phase 1 – Carbon Fixation 8:50
b. Phase 2 – Reduction 11:31
c. Phase 3 – Regeneration 12:02

tags: photosynthesis, biology, science, crashcourse, plants, light, calvin cycle, respiration, water, carbon dioxide, sunlight, xylem, time lapse, stomata, chlorophyll, photon, plastid, chloroplast, oxygen, thylakoid, grana, lumen, stroma, chemistry, fusion, photoexcitation, photosystem II, electron transport chain, protein, cytochrome complex, carbon fixation, rubisco, phosphoglycolate, reduction, regeneration, glyceraldehyde 3-phosphate, G3P, glucose, cellulose, starch, life Support CrashCourse on Subbable:


Margo Eaton says:

i have looped this vid for like five time , and i still dont fully understand the crazy photosynthesis system
Rip my bio exam

Katy Books says:


Steven Barnes says:

Can you make a photosynthesis video that is more kid friendly.

Meg “Gumi” Pover says:

so I was supposed to be revising GCSE level photosynthesis…
oh well….XD

PoisonVibe says:

You explained it really well and also in a funny kind of way!!! Good job and thanks! ;)

Stephanie Bien says:

Am I the only one watching just because it's interesting?

Alida Munir says:

now hopefully i can pass my AP Bio test tomorrow lmao

Sreshtaa Rajesh says:

Bio Midterm on Tuesday! Let's go!

Ahmed Said says:


Jandyra M. Bento Pires says:

God is crazy!

kristijan ahcin says:

So i'm greatful you stoped from saying that about 12 year olds….:/ lol

Sophie C says:

ofc my bio teacher decided to give us a spelling test on this as well as test so thanks BIO

Danny C says:

Shout out to everyone being tested on this, good luck

nektaria vouzali says:

Hi, The best results that my brother has ever had was with Freds Magic Remedy (i found it on google) Its the most helpful program available.

Atta moha says:

i have finals tomorrow and im so fucked

Pan kurczak says:

can't they just name all the things properly?
i mean… chlorophyll is stacked into… grana? that has lumen in it? Yes sir, and that helps in the creation of the dinglebop that is smoothed out with a bunch of shleem, and after that the shleem is pushed through the plumbo… Srsly people, name stuff properly.

Matt says:

5:31 Look on the left…it was a ghost :P

syzygy says:

Tomorrow, I have a test on…nothing because I'm an adult and don't have to go to school. I'm watching for personal enrichment.

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