A User's Guide to the Human Body

1 691 Shikime 172 mijë

If you've ever wondered why you crave certain foods or what your appendix actually does, there's something in this collection for you!
Hosted by: Michael Aranda
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Original episodes and sources:
Why Is My Body Temperature 37 Degrees?
Can You Get Too Much Sleep?
What Causes Food Cravings?
Your Appendix Isn’t Useless, After All
There Are Millions of Blood Types


  1. Nathaniel Anderson
    Nathaniel Anderson
    Ditë më parë

    I obviously need more Magnesium. 🙃

  2. Rednails0007
    4 ditë më parë

    Special request here: can you please make a video on proteins and amino-acids? I would love to learn the difference between all of them, how they are assimilated and their benefits to the human body. Thank you!

  3. imhyperer
    6 ditë më parë

    Wait, so is the relationship with smaller bodies in children and their breakdown of medication similar to how smaller mammals need to eat less, more calorie dense food (say a mouse vs a gorilla)?

  4. Mercury Howard
    Mercury Howard
    7 ditë më parë

    thank you for these tips, infiltrating and studying the human population will be much easier.

  5. Galaxia7
    7 ditë më parë

    Well I went into the craving video and once Chai Latte was mentioned I felt it xD aw with COVID I haven't had a chai latte in a year I miss it.

  6. Logan Stack
    Logan Stack
    10 ditë më parë

    The study of a llama tree

    1. Logan Stack
      Logan Stack
      10 ditë më parë

      🦙 🌳

  7. Damir Škrjanec
    Damir Škrjanec
    10 ditë më parë

    Is it blood type O or 0 (zero)? :confused:

  8. ComputerNerdInside
    14 ditë më parë

    5:36 Missed opportunity for Spongebob "CHOCOLATE!" reference!

  9. Cody Vanderzwaag
    Cody Vanderzwaag
    14 ditë më parë

    Sponsored by Taco Bell

  10. NoVaKane
    14 ditë më parë

    Msyby sleep isn't the cause of depression but a symptom

  11. NoVaKane
    14 ditë më parë

    Where's the trouble shooting section. Mine won't turn on . I tried plugging and unplugging in my penis and no change. Now I'm leaking I think oil? It's kind of sputtering out of me

  12. Ethan K. Tufts
    Ethan K. Tufts
    15 ditë më parë

    If we go a few degrees in either direction, we die, why would we have to worry about fungus?

  13. Ethan K. Tufts
    Ethan K. Tufts
    15 ditë më parë

    That first clip though didnt really answer the initial question. 'A few degrees above and below 37 and u can die. Why 37?'. He then explains why 37 is optimal BUT sure that says why 37 is preferable but why is it a REQUIREMENT?

    1. Chris V.
      Chris V.
      15 ditë më parë

      Presumably evolution. If all other options are inferior to 37, then the one whose body operates at 37 had greater evolutionary success and thus, is able to pass down their lineage until it becomes impossible to shift from 37. There is evolutionary pressure to shift to 37 and no pressure to shift to anything else.

  14. smurfyday
    17 ditë më parë

    Take it from me. Take antibiotics first before agreeing to appendectomy, unless you think it's burst. That's what Europeans have changed to, while American doctors are still quick to operate, for money.

  15. Brutalkawaii
    19 ditë më parë

    Until now, I've just been walking into the same wall for the past 26 years

  16. King of Dongles
    King of Dongles
    20 ditë më parë


  17. tacoPaco
    20 ditë më parë

    In Russia normal temperature is considered to be 36.6 C was confused to hear 37

  18. Justin H
    Justin H
    20 ditë më parë

    Cravings of celery and peanut 🥜butter and celery plus cheese 🧀whiz. And put broken up pretzels along it😋😋👍

  19. randomdoodification
    21 ditë më parë

    Pretty good Meatspace 102 lesson!

  20. Natural Instinct
    Natural Instinct
    21 ditë më parë

    4:46 again association doesn't mean causation. obese, sick, depressed individual are more likely to stay in bed more than healthy individuals

  21. Phillip Susi
    Phillip Susi
    21 ditë më parë

    Damn... I knew I shouldn't have let them take out my appendix. They told me it was useless anyway. I knew it had to have a purpose.

  22. J.J. Kuchenmeister
    J.J. Kuchenmeister
    21 ditë më parë

    Taco Bell makes me want to vomit, actually.

  23. hang da clown
    hang da clown
    21 ditë më parë

    some users guide, won't even tell me which muscles must be used in tandem with others to hold a given pose without needing assistance from outside sources. using my outdated spermatezoa guide doesn't help me move around much more than a Magikarp in a puddle...

  24. Robeon Mew
    Robeon Mew
    22 ditë më parë

    I can confidently disagree with everything the girl is saying about over sleeping

    1. Robeon Mew
      Robeon Mew
      22 ditë më parë

      And the food craving see almost had correct and then he turned it off. Your body is very smart if you listen to the cravings it will tell you what you're missing

  25. J. Wicker
    J. Wicker
    22 ditë më parë

    Where the he'll was this when I was born!?! I looked everywhere for it!

  26. Jessica L
    Jessica L
    22 ditë më parë

    I usually listen to SciShow as I go through my shutdown process. 🙃

  27. Jason Ullerich
    Jason Ullerich
    23 ditë më parë

    Great video! Love Michael! :)

  28. Felix Django O'Clair
    Felix Django O'Clair
    23 ditë më parë

    The first two guys should like they are imitating Hank...

  29. Nick Baker
    Nick Baker
    24 ditë më parë

    Why is this fat man telling me how to take care of my not-fat body...

  30. WormholeJim
    24 ditë më parë

    I was clickbaited into watching this video. I already know where to go for a crash course in the user's manual, see? in fact I went there and got it already - while still lacking the advanced courses - so I got baited into clicking by wanting to see how the rational sciences' take on compiling a user's guide to the human system might play out. Well, up and down, over and back around - whatever else I might have had to say with this comment, it all essentially just amounts to that the key is in the subjective realm of experience, not in the objective. Turn the cover of the manual by shifting attention inwards. Or "the only way out is in," as renowned Indian mystic and sage Sadhguru puts it. So, considering that, I guess It'll still be some time before the natural sciences catches up to just how deep this particular rabbit hole goes because it doesn't register very well on the kind of yardstick that the natural sciences uses. Other than making conclusions like doing yoga is good for the physical system and doing meditation seems to bring a certain sense of balance to the mind, superfluous stuff like that while metering out the exact difference in the chemical compositions of the test subjects. But I hope it won't be too long, and I actually don't think it will either. Not when thinking seriously about it.

  31. Janet Christian
    Janet Christian
    24 ditë më parë

    What's up with the puffy black vest? Are you recording outside? Hiding something?

  32. rosebrambles
    24 ditë më parë

    Aww you look so young in the first video 😊

  33. Heavy Metal Momma
    Heavy Metal Momma
    25 ditë më parë

    THANK YOU for explaining the different blood group systems in simple terms that can be understood by the average Joe and ACTUALLY GETTING IT RIGHT! As a Transfusion Scientist I get soooooo annoyed with people explaining it wrong. Also thank you for calling it the Rh system not the Rhesus system, it drives us potty when people do that! 🖤❤️

  34. Jordon Carlson
    Jordon Carlson
    25 ditë më parë

    So I went through the users guide, but I'm still having problems with my brain not braining right.. Is it too late for me to send in the warranty card?

  35. Jimmy Bond
    Jimmy Bond
    25 ditë më parë

    @ 7:02 Stress creates a physiological response, not just psychological.

    1. Jimmy Bond
      Jimmy Bond
      25 ditë më parë

      Calling it an appendix is degrading to its functional importance.

  36. Cornbreadfed kirkpatrick
    Cornbreadfed kirkpatrick
    25 ditë më parë

    I guess I took this quote to thy own self be true to heart

  37. mynamesnotrob
    25 ditë më parë

    You needed to go on a diet man.

  38. N
    25 ditë më parë

    00:48 riiight, hair is the biggest difference :)))

  39. TheMiguel
    25 ditë më parë

    Instructions not clear, arm stuck in zipper.

  40. Omar
    25 ditë më parë

    Instructions unclear, ended up with one ear inside my rectum

  41. Danny S
    Danny S
    25 ditë më parë

    Micheal gives the crow meets high science. But I will also say his badass jacket is making me feel hot.

    25 ditë më parë

    I miss Olivia

  43. steefant
    25 ditë më parë


  44. Frank Savage
    Frank Savage
    25 ditë më parë

    Usually I hate these "Compilations" because I've already seen the original, but in this one I've missed most of it

  45. 4one14
    25 ditë më parë

    lol was this timed to coincide with Bill Bryson's book on the same?

  46. Funk's boxing channel
    Funk's boxing channel
    26 ditë më parë

    I'm afraid to take use my body. I want to keep it mint in package.

  47. I’m already Sans Undertale
    I’m already Sans Undertale
    26 ditë më parë

    Thank you

  48. Neo2266
    26 ditë më parë

    I wish I got this manual back at the birth clinic

  49. insanetrini 1978
    insanetrini 1978
    26 ditë më parë

    dude, go on a diet

  50. Makuzi The Inuk
    Makuzi The Inuk
    26 ditë më parë

    why does the black hair girl look like a Californian stoner?

  51. Rot Kehlchen
    Rot Kehlchen
    26 ditë më parë

    The Body: A Guide for Occupants - Bill Bryson. Fun to read as well!

  52. Amelia Black
    Amelia Black
    27 ditë më parë

    Awe, you see happier and more comfortable in your skin in the short hair years. 😕

  53. BoneTale
    27 ditë më parë

    The Taco Bell part sounded like it was from personal experience 😂

  54. Albert Clarke
    Albert Clarke
    27 ditë më parë

    "I crave a radish" is a sentence that's never been heard.

  55. Blinded Bliss - Diana
    Blinded Bliss - Diana
    27 ditë më parë

    If I am in need of a blood transfusion, the 0.02% change of rejection, most likely is not the thing with the highest risk of killing me.

  56. Kisaki Sakura
    Kisaki Sakura
    27 ditë më parë

    I miss Olivia... so sad that she left Sci Show

  57. Daxxon Jabiru
    Daxxon Jabiru
    27 ditë më parë

    AB Neg.

  58. Michael Elbert
    Michael Elbert
    27 ditë më parë

    too late ! I don't need a user's guide for at least my body the male body. it's taking me several decades but if you want to do one specifically on the woman body ,that's what we need.

  59. Sterling O'Deaghaidh
    Sterling O'Deaghaidh
    27 ditë më parë

    "Celery just doesn't have the same effect" They obviously haven't met me, I had such a craving for vegetables, literally vegetables, that I walked out in a snowstorm to buy a salad from the grocery store. But I have rarely if ever actually had a craving for sugary or fatty foods believe it or not. Then again I'm the guy who will eat ahead of broccoli as a mundane snack without anything to dip it in so...

  60. JohnnyK
    27 ditë më parë

    Did you guys forget to pay the heating bill? Why the warm coats during the recordings?

  61. Leo Lionhart
    Leo Lionhart
    27 ditë më parë

    So there is actual DIO blood type to revive Joseph Joestar.

  62. Cherunabogu
    27 ditë më parë

    Title miss leading didn't teach me how to walk or operate the body

  63. Bryn D
    Bryn D
    28 ditë më parë


  64. Jonatan Romanowski
    Jonatan Romanowski
    28 ditë më parë

    Go Go Sci Show!

  65. marie kastler
    marie kastler
    28 ditë më parë

    Here to deny that Taco Bell is delicious.

  66. Vasile Sulica
    Vasile Sulica
    28 ditë më parë

    So do you wanna say that all the time I don't use it correctly?

  67. Paul Sherman
    Paul Sherman
    28 ditë më parë

    I enjoyed the video so much. I've been trying to find for a ALfirst vid like yours that breaks down the topics in this ALfirst vid! 🩺 The explanation at 1:16 is my favorite. Your breakdown reminds me of the vids of this insightful medical student Dr Ethan. Doctor's videos are useful and I actually learned a lot for midterms. He is an insightful health enthusiast on ALfirst and he talks about mental health. Go watch his ALfirst out and give Dr Ethan a like! ➡️ #DoctorEthanMedLife

  68. Valerie Pallaoro
    Valerie Pallaoro
    28 ditë më parë

    IKNOWI'MNOTSUPPOSEDTOBUT .. WOW!! short hair Michael for the win!

  69. Elanau
    28 ditë më parë

    hmmm.. so 7 hours of sleep is that sweet spot..

  70. Max Wood
    Max Wood
    28 ditë më parë

    where is this other video, "a users guide to the human brain" I can't seem to find it

  71. Sam Makin
    Sam Makin
    28 ditë më parë

    I can't find the troubleshooting and warranty section, I believe this model was meant to last about 80 years but it's only been 26 and it's breaking down.

  72. Hannah Ganske
    Hannah Ganske
    28 ditë më parë

    During my first pregnancy I was told I was 0- and with my first I was told I'm 0+ now is it possible for that to chance or was one of them wrong?

  73. Hannah Ganske
    Hannah Ganske
    28 ditë më parë

    A couple of months ago it was mustard for three days straight until I caved and ate some on my hot dog and tater tots

  74. Mary Devling
    Mary Devling
    28 ditë më parë

    My appendix was removed when I was 19. I'm 65 now and have had C. Diff 4 times, one nearly killed me. I started taking probiotics 5 years ago and haven't had problems since then.

  75. Baruch Ben-David
    Baruch Ben-David
    28 ditë më parë

    Scientists: We don't know what the appendix does; therefore, it has no purpose.

  76. Arrekesu
    28 ditë më parë

    Me being 6years an insomniac with almost no sleep for weeks turning into rock who sleeps 12h+ seems legit

  77. brahim best
    brahim best
    28 ditë më parë

    Be sure to keep all user documentation handy for future reference!😋😅

  78. Olog Hai
    Olog Hai
    28 ditë më parë

    Ghrelin is the name of my orc cousin. He likes to eat humans.

  79. LambGoatSoup
    28 ditë më parë

    So I shouldn't eat mushrooms??

  80. Eric D
    Eric D
    29 ditë më parë

    So wait, back when I needed supplemental magnesium and needed to gain back some fat, could I have just eaten tons of chocolate instead? lol

  81. MLU8811
    29 ditë më parë

    Another compilation... "we stopped coming up with new tidbits and just started recycling them."

  82. Dimitrij Maslov
    Dimitrij Maslov
    29 ditë më parë


  83. Erik Ling
    Erik Ling
    29 ditë më parë

    I thought I would never gain the confidence to use my human body. Now I use it almost once every day. Thanks guys!

  84. Александр Ильиных
    Александр Ильиных
    29 ditë më parë

    It's not even a quick start guide, it's just a collection of facts related to some of the body's functions :/

  85. Isaiah Davis
    Isaiah Davis
    29 ditë më parë

    Does anyone else wonder who is the writer’s for scishow

  86. Sweet Majesty
    Sweet Majesty
    29 ditë më parë

    *me*: writing down rare blood types for future vampire based day dreaming

  87. Sweet Majesty
    Sweet Majesty
    29 ditë më parë

    The demon inhabiting my body: *taking notes*

  88. Kim Bratton
    Kim Bratton
    29 ditë më parë

    I loved this video, Michael is awesome too!!

  89. Rain Williams
    Rain Williams
    29 ditë më parë

    Due to food scarcity as a child I have an extremely hard time recognizing hunger and cravings, as well as sating them when I do.

  90. T B
    T B
    29 ditë më parë

    Obviously youve never experienced pregnancy, I'm sorry but science can't explain everything yet,, I craved eggs during one of my pregnancies,, (I had never ever liked eggs before and today ~ 6 years later, I can still occasionally eat them,, but before my pregnancy, I HATED eggs, they legit made me vomit) and orange juice w slim jim's isn't good to any one but a pregnant lady ✌️✌️

    1. T B
      T B
      29 ditë më parë

      Also........hormones do affect your mood,, so if your mood is affecting your cravings === it's indirectly pregnancy hormones that cause cravings

  91. Dave B
    Dave B
    29 ditë më parë

    *Get a hair cut hippy* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  92. Dave B
    Dave B
    29 ditë më parë

    *I lost my own owners manual*

  93. Gina Woolsey
    Gina Woolsey
    29 ditë më parë

    Why is Michael so cold, can't they afford heat

  94. Gina Woolsey
    Gina Woolsey
    29 ditë më parë

    I know Michael said he had much shorter hair, but I was still a bit shook when he showed up with the short hair

  95. RayRexDex
    29 ditë më parë

    10000100010110110111101010101 Thanks for te-e-lling me how to u-se my bo-o-dy.

  96. Captain Eastonium
    Captain Eastonium
    29 ditë më parë

    7:29 "Celery just doesn't have the same effect" Me: *Looks at the piece of celery I'd been thoroughly enjoying with sudden confusion*

  97. World Theory
    World Theory
    29 ditë më parë

    This is good! I wonder how long volume two will take to complete.

  98. Kye Talks
    Kye Talks
    29 ditë më parë

    That last section about dosing has me SHOOK.

  99. Evan Chartrand
    Evan Chartrand
    29 ditë më parë

    Don't you know that no one reads the instructions

  100. ジZNB
    29 ditë më parë

    User's guide?