Digestive System, Part 2: Crash Course Anatomy & Physiology #34

Sdílet
Vložit
  • čas přidán 7. 09. 2024

Komentáře • 551

  • @crashcourse
    @crashcourse  Před 4 lety +118

    Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/2SrDulJ

  • @andrewdjburke
    @andrewdjburke Před 6 lety +540

    I could learn to be a rocket scientist with this guy as my teacher.
    You have the best method of teaching I have experienced thus far.
    Please never stop making more science videos.

  • @LifeIsForEmos8D
    @LifeIsForEmos8D Před 9 lety +919

    I have a feeling Beaumont WAS the hunter!!

  • @TheFireflyGrave
    @TheFireflyGrave Před 9 lety +267

    St. Martin had a holy (hole-y) stomach. He's now the patron saint of the digestive system, the internet and all other tubes everywhere.

    • @FROPDESAI
      @FROPDESAI Před 9 lety +2

      +TheFireflyGrave Holey Coral. Holey.

    • @crashcourse
      @crashcourse  Před 9 lety +72

      +TheFireflyGrave You've done good work here.
      -Nicole

    • @FROPDESAI
      @FROPDESAI Před 9 lety +17

      CrashCourse NOTICE ME NICOLE SENPAI! NOTICE ME!

    • @PorshaLaVieBelle
      @PorshaLaVieBelle Před 7 lety +2

      TheFireflyGrave lol.love it

  • @SuperMissIsabelle
    @SuperMissIsabelle Před 6 měsíci +14

    I'm a medical student and after every lecture I always come here to understand better. You're the best!! Literally wouldn't pass my tests without you!

  • @angelalaplante1451
    @angelalaplante1451 Před 5 lety +246

    What's the point in paying for college when you can learn more in 20 minutes than you learned in an entire semester.

  • @NathanFales
    @NathanFales Před 9 lety +590

    This video is more than I can stomach.

    • @epistax4
      @epistax4 Před 9 lety +16

      +Nathan Fales This stomach is more than I can bacon.
      Wait that doesn't make sense.
      Wait actually it kind of does.

    • @benaaronmusic
      @benaaronmusic Před 9 lety +57

      +Nathan Fales - You gotta be kidney me. These puns are hard to swallow.

    • @dhartmahmed50
      @dhartmahmed50 Před 9 lety +8

      +Nathan Fales MY QUEST IS AT AN END. Looking for the pun comment in this video.

    • @carolinestbmw8695
      @carolinestbmw8695 Před 7 lety +2

      Ben Aaron 😂😂GOOD ONE

    • @LuisSierra42
      @LuisSierra42 Před 6 lety +15

      this comment section is more than i can digest

  • @alyssaatkinson7029
    @alyssaatkinson7029 Před 5 lety +134

    It’s 2019(I’m aware this was posted a while ago), and I’m using this to help me with my science project and I just want to thank you for making these high quality videos that help educate people.

  • @NaturallyPrettyBrownK26
    @NaturallyPrettyBrownK26 Před 6 lety +54

    My mouth dropped after googling and finding out that the story between Sir Martin and Beaumont actually happened 😦

  • @Kilo6Charlie
    @Kilo6Charlie Před 9 lety +114

    I watched this WHILE eating dinner...
    I REGRET NOTHING!!!

  • @SoccerBoi500
    @SoccerBoi500 Před 8 lety +75

    These videos are half the reason I have an A in Anatomy 2! Thanks Hank!

  • @sanjaymahajan2202
    @sanjaymahajan2202 Před 8 lety +541

    I watch crash course for my exams

  • @explained4242
    @explained4242 Před 3 měsíci +7

    This dude is legit. even 8 years later in 2024.

  • @ryancspencer999
    @ryancspencer999 Před 6 lety +74

    I watched this while eating, it was a very weird experience.

  • @123ObbYzz
    @123ObbYzz Před 7 lety +72

    First year at uni this is my only revision tool

    • @palaksharma1777
      @palaksharma1777 Před 7 lety +3

      Sending you blessings from second year at uni

    • @kensom8796
      @kensom8796 Před 7 lety +1

      1st year.
      Am i too late?

    • @Aphelia.
      @Aphelia. Před 4 lety +3

      3rd year of high school here. How's uni going?

    • @animeandstuff5377
      @animeandstuff5377 Před 4 lety

      @@Aphelia. y u even need this info in highschool

    • @smartassnerd4287
      @smartassnerd4287 Před 4 lety

      @@animeandstuff5377 what do you think we learn at high school????

  • @Sup3rD4ve
    @Sup3rD4ve Před 6 lety +62

    My parents met while working at, and I and my brother were both born at, William Beaumont Hospital in Royal Oak, Michigan.

    • @arthas640
      @arthas640 Před 5 lety +5

      I went to a school named after St Martin... it was a different St Martin, but still...

    • @luvu4evr1999
      @luvu4evr1999 Před 4 lety +1

      I work at Beaumont in Troy!!

    • @luvu4evr1999
      @luvu4evr1999 Před 4 lety +1

      Um... yeah. If someone was that desperate to find me they could without the comment. It’s not like I said what floor I work on and the hours I’m there. It’s a BIG hospital with lots of security. Plus there are 3 Beaumont’s in Troy so come find me 😂😂

  • @mitchell186199
    @mitchell186199 Před 8 lety +64

    Great video! Just a single correction I would do: Gastrin (6:55) is excrated in the blood, not in the stomach itself (gastrin is a hormon after all, not an enzyme)

    • @Zizzyyzz
      @Zizzyyzz Před 5 lety +7

      Is a "hormon" like a hormonal Mormon?

    • @diyapudota
      @diyapudota Před 4 lety +21

      YOU DARE CORRECT CRASH COURSE

  • @erilassila409
    @erilassila409 Před 7 lety +33

    My digestive system is interesting. I've had chronic constipation since the age of three, and recently my number twos got drastically softer than usual, and my blood tests showed as if there was something wrong with my liver. I found out from a nurse (my mom) and a doctor we know, that it might be vitamin d deficiency. I got wonderfully skinny (waist circumference 81 cm) and started taking vitamin d regularly. it was really funny! I thought I was dying of liver cirrhosis and had to stop my favorite pastime (student parties) and it was just me forgetting to eat my vitamin d pills. Once I took my vitamins, my poop became harder and brown again. I actually found out what this whole poop shenanigan was, thanks to Hank and SciShow!

  • @naisharao
    @naisharao Před 6 lety +11

    Very nice explanation of digestion . Thank you so much CRASH COURSE . You teach very well Hank . In a 10 minute video , all main concepts are explained .

  • @HappiSweetPea
    @HappiSweetPea Před 4 lety +6

    If anyone wants more about St Martin and Beaumont, there is a Sawbones episode about it labeled The Gut Hole Romance. It's incredibly interesting.

  • @ahsanzahid718
    @ahsanzahid718 Před 7 lety +242

    So how does St.Martin take a shower

    • @JingLiisnotreal
      @JingLiisnotreal Před 7 lety +89

      Now we're asking the real questions.

    • @gorgeous3325
      @gorgeous3325 Před 7 lety +35

      Right?? That's hard enough to do with a plaster cast on your arm, let alone a gaping hole in your... well, in _you_!

    • @nexuswolf780
      @nexuswolf780 Před 6 lety +17

      Isn't that hard; you literally have a doctor as your servant.

    • @blackbogbrewing3186
      @blackbogbrewing3186 Před 6 lety +61

      How did he do a lot of things??? Like sleep on his back or torso without stomach acid getting all over the sheets.

    • @joecurran2811
      @joecurran2811 Před 6 lety +7

      Brendan Phares he sounds like a legend to me!

  • @aparnatalukdardas584
    @aparnatalukdardas584 Před 2 lety +7

    Thanks a lot! Sir your videos make it so much easier to learn such complex topics. I'm in class 8 now but I still can understand it quite well. Kudos to you and your team!!!

  • @mkbashlorthecaredriver9517

    I just started watching this channel today to learn more about the digestive system, due to some recent medical issues I've had. This guy is so funny. I'm gonna keep going. Thank you!

  • @QUICKFACTS247
    @QUICKFACTS247 Před rokem +15

    I watched crash course for my degree 💀

  • @echologname
    @echologname Před 4 lety +3

    8:35 is why IBS can be so problematic for some people. Stress makes me feel like I'm being stabbed in the gut, I have to spend hours on the toilet and eat only bland things. It's not fun, I'm glad I'm now taking anxiety medicine.

  • @parthjobanputra313
    @parthjobanputra313 Před 9 lety +7

    Crash course is going so well I have watched crash course biology 😍😍😍😍
    it helped me a lot to clear my tests n now A &P is equally fantastic
    Hank Green is just awesome. ....God bless that guy

  • @somenerdyblonde
    @somenerdyblonde Před 9 lety +3

    I'm loving this subsection of a&p. My physiology class didn't go into much detail, and I love the digestive system. I do wish the lack of knowledge about vomit was acknowledged.

  • @hartbigfan1714
    @hartbigfan1714 Před 7 lety +7

    dude I study medicine and when I first clicked on this video I thought "Oh well it's just a cartoon thing - it can't be that detailed" and I was amazed by all the things he said: It's all correct and so detailed and just on a really high niveau of education while explainig it very simple :D

  • @alexandergonchiy1298
    @alexandergonchiy1298 Před 9 lety +52

    8:33 - "If you are super anxious, [...] you're sympathetic nervous system will also inhibit gastric secretion [...]"
    "You're" instead of "your" in scishow? Woah.

    • @kitsunekyubino9345
      @kitsunekyubino9345 Před 9 lety +2

      +Kehla Martri It wasn't clear, because my resolutions not very good today, but I think it also had effect (noun) where it should have been affect (verb).

    • @kitsunekyubino9345
      @kitsunekyubino9345 Před 9 lety +1

      Woo! Somebody beat somebody to something!

    • @AzureKite
      @AzureKite Před 9 lety +2

      +Roberta Tallienne Better than beating something to somebody if you catch my drift ;)

    • @kitsunekyubino9345
      @kitsunekyubino9345 Před 9 lety

      I actually don't. Is it something sexual?

    • @AzureKite
      @AzureKite Před 9 lety

      Roberta Tallienne y-yes... nevermind

  • @Just_different132
    @Just_different132 Před 4 lety +3

    Dude i know its too late, but you just saved me. OMG 10x better than my lecturers!

  • @jimmyd1143
    @jimmyd1143 Před 9 lety +3

    John and Hank Green are my favorite Greens

  • @christinevakas92
    @christinevakas92 Před 2 lety +3

    Thank you for the laughs. You make education 'simple' and fun.

  • @rich3326
    @rich3326 Před rokem +1

    my human anatomy exam is in less than 4 hours and this has helped immensely

  • @withanametocome
    @withanametocome Před 8 lety +189

    Part 1: mouth
    Part 2: stomach
    I do not like where this is going

  • @annelasowski2739
    @annelasowski2739 Před 8 lety +1

    Great video. Pop ups don't stay long enough to read though in case they are imparting information that is relevant.

  • @XStoneColdFoxX
    @XStoneColdFoxX Před 4 lety +2

    6:11 lol. I love how they animated a chicken leg inside his coffee cup.
    This video reminds me of fistulated cows that are used to study their digestion.

  • @12belvasanithayar.k.93
    @12belvasanithayar.k.93 Před 4 lety +2

    I will tell my biology teacher about this wonderful channel. Maybe we can learn together with this.

  • @flexotar
    @flexotar Před 8 lety +2

    Oh, man. You guys should totally try to do a chemistry segment where you explain plastination preservation. That would be pretty cool!

  • @bigtimemariee
    @bigtimemariee Před 9 lety +1

    These videos are so perfect! Please come be my teacher - watching these videos I learn so much more than going to class!

  • @losthighwaygnr3685
    @losthighwaygnr3685 Před 9 lety +7

    God Bless you guys ( especially Hank ! ) - I adore these Biology Videos :)!

  • @stoneroses3493
    @stoneroses3493 Před 5 lety +1

    I cracked up laughing at 9:48 lol!

  • @madisonbrunette3134
    @madisonbrunette3134 Před 7 lety

    You and Bozeman Science are my saving grace.

  • @jerrica884
    @jerrica884 Před 8 lety +4

    All of your videos are a great help!!!!!! love the animation you have!

  • @thetrouts1
    @thetrouts1 Před 9 lety +2

    hey - can u make one about periods/ovulation? i need to know what is happening in my body atm and you are my fav source of body information

  • @briannamuniz255
    @briannamuniz255 Před 4 lety +1

    I love these because they help with my tests

  • @Abominatrix650
    @Abominatrix650 Před rokem +1

    Brilliant!

  • @railene9335
    @railene9335 Před 7 lety +1

    Crash course, I was wondering if you had like a basic summary of the whole digestive system or any other systems, because I am taking down notes. Thank you

  • @shannelpanton2696
    @shannelpanton2696 Před 6 lety +1

    That story just killed me

  • @sosassteelstrings9623
    @sosassteelstrings9623 Před 4 lety +3

    Is it wrong for me to salivste as I watch this video?

  • @macwas5900
    @macwas5900 Před 9 lety +34

    Againnnnn, the intro played a quarter way into the video. GOD DAMN IT, HANK!

    • @truboo4268
      @truboo4268 Před 9 lety +3

      +Mac Was Pfff... Watch CC Psychology. A few episodes have intros that are almost HALF the episode.

    • @xrystalskyes2838
      @xrystalskyes2838 Před 9 lety

      That happens to me in other videos but didn't happen in this one, I think that is CZcams's fault. But who is Hank?

    • @macwas5900
      @macwas5900 Před 9 lety +1

      Bryan Cotto But Hank... oh my God, he just rambles on before the intro even plays, EVERY TIME. Every time while everyone else (That I watch on CC) just says a short thing, like a pun or short bit of info for 10-20 seconds and then let the intro play, then get to the point. Hank, though... HE JUST GIVES AN ENTIRE SUMMARY AND SPEECH BEFORE IT STARTS! XD

    • @macwas5900
      @macwas5900 Před 9 lety +1

      Osiris 12
      It's the dude talking in this video... O_O

    • @xrystalskyes2838
      @xrystalskyes2838 Před 9 lety +1

      I see what you mean... I didn't mind it

  • @yourfriendlyneighbourhoodh4700

    Im wondering why vomiting can be caused by a miscommunication in the brain, like how car sickness is caused by your body saying "I'm sitting still" and your visual cortex saying "were on the move"
    I'm guessing it's an adaptation to poisons? Poisons can cause miscommunication therefor the body will try remove them from the body. I'm just speculating if anyone has a definitive answer please let me know

    • @maxk8486
      @maxk8486 Před 6 lety +2

      Its not necessarily a miscommunication, its more just your body is getting ready for the fight/flight and so what happens is you don't want stuff in your stomach being digested and potentially using up energy that could be used in your fight/flight

    • @solaria9
      @solaria9 Před 6 lety +2

      You've pretty much hit it spot on. Your body hasn't caught up to modern times so it still assumes all miscommunication is from poison

  • @user-xc7qi9ns8j
    @user-xc7qi9ns8j Před 4 lety +1

    GREAT WORK👍🏻💪🏻😱

  • @sjoerdwennekes
    @sjoerdwennekes Před 9 lety +28

    In my language (which is Dutch) we also use the word "bolus", but here it means turd... So the same word, but for the thing that comes out of your digestive system, and not for what goes in it. At least I hope... o.O

  • @gokbox
    @gokbox Před 9 lety +4

    Thanks for the video it was informative

  • @pooj_ashok
    @pooj_ashok Před 8 lety +1

    the esophagus - 'is really just a glorified laundry chute lined with smooth muscle' 😂😂

  • @AlexanderEmmanual
    @AlexanderEmmanual Před 9 lety +2

    If your nervous your sympathetic nervous system will inhibit gastric secretion was the biggest take away for me. I remember when I was younger id get nervous/anxious in certain situations and loose all my appetite and suddenly my bowels/bladder felt like they had to get rid of everything in my body. Was really SHIT.

  • @AngelFrost02
    @AngelFrost02 Před 9 lety +2

    I LOVE these videos, PLEASE make more! These videos help me so much with AP Bio!

  • @Azzarinne
    @Azzarinne Před 9 lety +2

    You were really trying to make us sick with this one, weren't you? XD
    The soda cans full of saliva are what got to me... **gurggle**

  • @audreypalmier2471
    @audreypalmier2471 Před 5 lety +1

    Probably one of the most interesting videos out there ❤️❤️

  • @najwaaleena4597
    @najwaaleena4597 Před 4 lety +1

    i pity martin, but thanks to him for helping the science ♥️

  • @soulstar005
    @soulstar005 Před 6 lety +2

    thank the gods for crash course...lol

  • @VyvienneEaux
    @VyvienneEaux Před 4 lety +1

    As a former bulimic, I can confirm that the stomach can hold a gallon of food or more. In fact, I think it can hold 2-3 gallons of food, because I remember filling a five gallon bucket with vomit in two consecutive binges-purge session.

  • @justswift5369
    @justswift5369 Před 8 lety

    7:50 Squid eyeballs? I would not be polite about that. "Get those eyeballs away from me!"

  • @exactscallion7
    @exactscallion7 Před 7 lety +3

    You are amazing. the way you explain is seriously super cool.

  • @adrian56837
    @adrian56837 Před 5 lety

    Thanks to the guy who shot St. Martin, im suffering in reviewing this gastic juices and other stuff

  • @autentyk5735
    @autentyk5735 Před 4 lety +1

    Oh my bloody god @ the 08:32 your vs you're. I thought this was my favorite EDUCATIONAL channel, not one where the one single most appalling error feels at home.

  • @vanessahoy8612
    @vanessahoy8612 Před 6 lety +1

    Thank you for the Video! I'm learning a lot from your videos, great Job!

  • @franciemullenix9594
    @franciemullenix9594 Před 7 lety

    actually watched this while eating lunch. Great help!

  • @calebshade4991
    @calebshade4991 Před 9 lety

    Is it strange that I found this more fascinating than the Nebulae video on CrashCourse Astronomy? Actually this is one of the most fascinating videos I've ever seen from CrashCourse.

  • @robertyoung9917
    @robertyoung9917 Před 5 lety +2

    you make learning sooooo fun! Thank you!!

  • @mayorofsimpleton5674
    @mayorofsimpleton5674 Před 7 lety +2

    Thank you so much! I have a test on cells and the digestive system tomorrow. This has really helped me understand.

  • @nicolekathryn5100
    @nicolekathryn5100 Před rokem

    Much more helpful than my bio professor, thank you for getting me through nursing school

  • @teganfrancis6772
    @teganfrancis6772 Před 9 lety +3

    This is so good. So blown away by you guys! 😊😁

  • @irenekalaitzidis3493
    @irenekalaitzidis3493 Před 8 lety

    THESE ARE THE BEST VIDEOS EVER I LOVE YOU CRASHCOURSE

  • @sarai9102
    @sarai9102 Před 5 lety +4

    The story was so gross and awesome 😂

  • @ant420
    @ant420 Před 9 lety +20

    How can you keep a hole open? Shouldn't the acid spill out

    • @drewg.4779
      @drewg.4779 Před 9 lety +2

      I imagine that they plugged it up somehow

    • @tjshah8704
      @tjshah8704 Před 6 lety

      no

    • @KrisRyanStallard
      @KrisRyanStallard Před 6 lety +2

      It did at times. If I remember correctly, he couldn't sleep laying flat.

  • @Stevobulfer
    @Stevobulfer Před 9 lety +1

    man... I love crash course so much!

  • @RickyLi
    @RickyLi Před 9 lety +2

    1/2 way thru this I wanted to rewatch Osmosis Jones. Thanks I think.

  • @michelleyvonne1980
    @michelleyvonne1980 Před 5 lety

    I love his sense of humor.

  • @barsxsalicia
    @barsxsalicia Před rokem

    I'm eating a meal as I watch this 😂😂

  • @Kikuye
    @Kikuye Před 6 lety +6

    Salivary amylase + starch = maltose
    not glucose.
    Technically it becomes glucose later when broken down by maltase.

  • @cassidyjohnson8480
    @cassidyjohnson8480 Před 6 lety

    The beginning was awesome and interesting.

  • @topealabi897
    @topealabi897 Před rokem

    Thank you this really helps me crash course

  • @jerrica884
    @jerrica884 Před 8 lety +1

    Love the extra information about michigan too! im from michigan!

  • @snkit3436
    @snkit3436 Před 4 lety

    B27(1)
    3:55
    4:09
    5:37

  • @brezeggae1
    @brezeggae1 Před 7 lety

    These videos are saving my life right now. Thank you

  • @GhostsOfThings
    @GhostsOfThings Před 9 lety +1

    I was eating a grilled cheese sandwich while watching this, and had to pause when Hank mentioned it XD

  • @jameshendershott2170
    @jameshendershott2170 Před 5 lety

    I freaking LOVE this guy

  • @rayamoooooo685
    @rayamoooooo685 Před 4 lety

    Past scientist just always rock my socks off.. Yes sir..

  • @ishaikaru6311
    @ishaikaru6311 Před 7 lety

    cool stuff. these vids r helping me with my gcse even though I am in year 10

  • @vivean492
    @vivean492 Před rokem +1

    thankyou so much 💓

  • @dunyakado4909
    @dunyakado4909 Před 7 lety

    Haaha i loved the wayhe explained the story about st martin .. 83 years old and still alive :D

  • @MrUppinakayi
    @MrUppinakayi Před rokem

    i would alos like to say thank you for all the work you put into making the video and flashcards

  • @KiddsockTV
    @KiddsockTV Před 9 lety

    Hey Guys. Can you look into Gastroparesis? Not many doctors know about it, and no one really knows what causes it and it is very hard to treat. If anything it would help bring awareness to this sad and crazy disease. Thank you!

  • @NoozeCat
    @NoozeCat Před 9 lety

    Could you make an episode about heart burns? It would be very fitting.

  • @HughHuynh93
    @HughHuynh93 Před 6 lety

    TFW this is actually really helpful in helping me study for GI block lol

  • @Mobtron_
    @Mobtron_ Před 6 lety

    This video is more than I can digest

  • @kimberleasouth2313
    @kimberleasouth2313 Před 4 lety +1

    I found a typo! It says you're gastric secretions at 8:35 :) I've been watching crash course forever and this is the first time I've noticed one!

  • @michaelpesavento8268
    @michaelpesavento8268 Před 9 lety

    Hi Hank, I was born at William Beaumont Hospital in Royal Oak Michigan just outside Detroit. I never heard this story about him. Thanks for the Info.

  • @kristen3175
    @kristen3175 Před 5 lety

    Beaumont hospitals are popular in michigan and theres even a medical school named after him!