By YouTube Originals
.
.
Today, Ken Jeong will fill in for Hannah Healey, whose class is learning about digestion and the human body.
Transcript provided by YouTube:
00:02
( music playing )
00:04
How are you today?
00:05
♪ Celebrity ♪
00:06
Hi, I’m Ken Jeong,
00:09
and I’m your “Celebrity Substitute.”
00:13
Have you ever wondered why
00:15
when you eat a chocolate chip cookie
00:17
you never see the chocolate chips again?
00:19
Where do they go?
00:20
As a Biology teacher, I get a lot of strange questions
00:24
about how your body works.
00:25
But in order for me to explain where the disappearing
00:28
chocolate chips are going, you’re gonna have to understand
00:31
the body systems.
00:32
But the thing is, I’m not gonna teach you this lesson.
00:35
I’ve been working way too hard
00:36
trying to get my online classes running,
00:38
and honestly, I need a break.
00:40
Luckily, we have convinced
00:42
a very special substitute to fill in for me today.
00:45
He’s not only a star,
00:46
but he’s also a licensed physician.
00:48
Today’s celebrity substitute is Ken Jeong.
00:51
Hi!
00:54
Hi, Ken!
00:55
– How are you doing? – Good. How are you?
00:58
Fine. Thank you for having me. Thank you so much.
01:01
No, look at all the accolades behind you on the wall.
01:04
Thank you for having me.
01:06
They’re just props that mean nothing.
01:09
But, no, it really is an honor and a privilege
01:10
to be part of this very special project,
01:12
and, uh, let’s educate, yo.
01:15
To start this lesson, we have to ask…
01:20
And to understand what happens to food once we eat it,
01:22
I’m gonna have to teach you how human bodies work.
01:25
So, let’s dive into the human body systems.
01:29
The human body overall has 11 major organ systems–
01:33
digestive, reproductive,
01:35
urinary, musculoskeletal,
01:38
lymphatic, immune,
01:40
nervous, endocrine,
01:42
respiratory, integumentary,
01:45
circulatory.
01:46
I like to remember these systems
01:48
using a little mnemonic device,
01:49
or acronyms, if you will,
01:51
where every letter corresponds
01:53
to a different body system.
01:54
I just think of “Drumline Ric.”
01:58
“Drumline,” it’s a movie starring
02:00
my “Masked Singer” co-star Nick Cannon,
02:02
and “Ric,” Nature Boy Ric Flair.
02:05
Whoo! Both great things.
02:09
The circulatory system is your blood,
02:12
blood vessels, and heart.
02:13
Look at me. I have a good heart.
02:16
The integumentary system is your skin.
02:18
Look at me, I’m a celebrity,
02:20
therefore I have thin skin.
02:23
The respiratory system is your lungs,
02:25
windpipe, and airways,
02:27
inhaling oxygen and expelling carbon dioxide gas.
02:31
I’m a celebrity, therefore I am full of gas.
02:36
The endocrine system is made up of the glands that secrete hormones.
02:39
It helps regulate your body systems
02:41
and controls things like adrenaline.
02:43
When I perform, I get an adrenaline rush, yo.
02:48
Then you’ve got the nervous system,
02:50
and that’s the brain, spinal cord, and nerves.
02:53
The immune system is like your body’s security guards
02:56
keeping you safe from intruders.
02:58
Not unlike my human security guards,
03:01
of which I have three.
03:03
The lymphatic system drains fluids and substances away
03:07
to be filtered, excreted, and recycled.
03:09
It’s kind of like the body’s garbage disposal.
03:12
Not to be confused with my security guard
03:14
who disposes my garbage.
03:17
The musculoskeletal system
03:19
is my skeleton and all the muscles,
03:21
tendons, and ligaments that are attached to it.
03:23
I don’t lift weights, therefore I have weak muscles.
03:28
The urinary system, well, that’s like your pipes.
03:33
Hannah: The urinary system is how your body
03:35
is actually filtering your blood
03:37
and getting rid of toxins and waste.
03:39
Ken: And then the reproductive system
03:41
is how humans reproduce.
03:43
It’s how babies are made,
03:45
and my wife and I made two.
03:51
And now that you’ve gotten an overview of the body systems
03:54
and we understand that they’re all interconnected,
03:56
let’s take a look at how a single system works
03:59
from start to finish, and that system is going to be
04:02
my favorite system, the digestive system,
04:05
’cause I like to eat.
04:07
I’m about to demonstrate how the digestive system works,
04:10
and I’m gonna do it in the most personal way possible–
04:13
using my own body.
04:15
I’m gonna eat a food
04:16
and then we’ll watch as it travels through
04:18
my digestive system.
04:20
But first, I’ve got to decide what food I’m going to eat.
04:24
Actually, Ken, can one of my students help us pick
04:27
what we’re gonna do for this next demonstration?
04:30
No.
04:32
Kidding. Yes.
04:34
I would be honored. That’s a great idea.
04:36
I’d love to have one of your students help me out,
04:39
as long as they like five of my movies.
04:42
– Hey, Desiree. How are you doing? – Hi, Miss Healey.
04:45
Hannah: I know we were going to be doing
04:47
an online lesson together,
04:49
but I actually have someone here
04:51
who’s going to help do the lesson with us, okay?
04:55
– Okay. – Celebrity substitute Ken Jeong.
04:59
– Hi! – Hi!
05:01
How are you doing, Desiree?
05:03
I’m so good. How are you?
05:05
Fine. Thank you for helping me out.
05:08
– Thank you for doing this. – Of course.
05:11
Are you doing okay? You doing good?
05:12
I’m good. I’m nervous.
05:14
Oh, no. It’s nothing to be nervous about.
05:18
It’s just me, the dumbest guy from “The Masked Singer.”
05:22
Okay, so, Desiree, we’ve been doing a whole lesson
05:25
on the digestive system, and we are actually–
05:28
well, not me, but Ken needs your help
05:30
picking something out to kind of get this lesson going.
05:33
Okay.
05:35
Okay, so, Desiree,
05:37
this is really, really important,
05:39
and Hannah and I need your help.
05:41
And I don’t mean to make you nervous,
05:43
but there’s a lot of stakes involved.
05:44
Can you help us out?
05:48
I think I’m up for the challenge.
05:50
Okay, bear with me. Wait for it.
05:55
Oh, man. I’m getting nervous myself.
05:58
Desiree, you have to pick
06:02
which one of these cookies I eat.
06:05
These are important cookies.
06:07
Celebrity cookies.
06:09
You need to make your choice clearly and wisely.
06:13
I tried choosing it myself,
06:15
but it took me over six hours.
06:18
The one with more chocolate chips.
06:20
Desiree, are you a member of a think tank?
06:23
That’s amazing.
06:25
Wow, you weren’t kidding. She is smart.
06:28
The goal of the digestive system is to take food
06:31
and break it down into nutrients that the body can use.
06:35
So, prepare to become nutrients, nutrients, nutrients.
06:39
Oh, my digestive system starts working before
06:43
the food even gets to my mouth hole.
06:45
The sight and smell of food
06:48
alerts my body’s digestive processes to get started.
06:53
Mmm.
06:54
Now, my teeth are breaking the cookie down
06:59
into smaller, more manageable pieces.
07:03
And I’m really getting
07:04
that saliva mixed in with the food.
07:07
My saliva contains an enzyme, amylase,
07:11
that helps break down the starch in that cookie.
07:13
And the saliva also gets the food slippery
07:17
so it can smoothly travel to its next stop
07:20
in the digestive system, the esophagus.
07:23
I can feel the muscles in my esophagus contracting
07:26
to get that cookie moving on down.
07:28
And at the end of the esophagus,
07:30
a muscular valve contracts and relaxes to allow the food
07:34
to enter my stomach.
07:35
And once the food reaches the stomach,
07:38
it gets broken down by gastric acid
07:40
that’s formed within the stomach lining
07:42
that’s also made up of hydrochloric acid,
07:45
potassium chloride, and sodium chloride.
07:47
And that mixes with digestive enzymes
07:50
that break down the carbs, proteins, and fats
07:53
into their smaller building blocks.
07:55
And as soon as that cookie gets broken down enough,
07:57
it’s gonna start moving out of my stomach
07:59
and into my small intestine.
08:02
And scene.
08:06
So, the small intestine is called small,
08:08
but really it’s anywhere from 9 to 27 feet.
08:11
The large intestine’s only five feet long.
08:14
So that’s kind of counterintuitive, right?
08:16
Yeah. It’s like the intestines of irony in the house.
08:20
But we call the small intestine small
08:23
because it’s narrower than the large intestine.
08:26
And we’re talking about diameter here, not length.
08:28
And the small intestine is lined with a mucus membrane
08:32
that allows nutrients to pass through.
08:35
Digestive enzymes, hydrochloric acid,
08:37
and bicarbonate work to break down food small enough
08:40
so it’s possible to be absorbed.
08:42
After the small intestine,
08:43
the food moves into the large intestine.
08:46
And when the cookie gets to the large intestine,
08:48
all that’s remaining is water, electrolytes,
08:52
and waste products.
08:53
And at this point in the digestive system,
08:55
we’re mostly dealing with the parts of the cookie
08:57
that couldn’t be absorbed as nutrients.
09:00
And the large intestine will absorb the water,
09:03
and the rest, to be polite,
09:05
because it’s YouTube Learning,
09:06
let’s call it stool.
09:08
So, why would we eat a cookie?
09:11
Don’t the chocolate chips make it all the way to the stool?
09:14
Well, simple sugars are digested by enzymes in the small intestine,
09:18
and to a small extent in the mouth
09:20
right after we eat them.
09:22
Then they’re immediately absorbed into our bloodstream.
09:24
It’s unlikely that any more
09:26
than the just teeny tiniest amount of sugar
09:28
is making it to the very end of the digestive tract.
09:31
So that’s where the chocolate chips
09:34
are disappearing to– your blood.
09:37
Isn’t that amazeballs? Yes, it is.
09:41
Well, thank you, Desiree, so much for helping us out.
09:45
We really, really appreciate it.
09:47
And most importantly,
09:48
you taught me how to count chips.
09:52
When I think of counting chocolate chips,
09:54
I will always think about Desiree, yo.
09:58
Bye, Desiree. Thank you so much.
10:01
Bye.
10:02
Hannah, it has been an honor teaching alongside you
10:07
and I just have one more question.
10:09
– Yes, Ken, what’s up? – Might I use the bathroom?
10:12
As long as you sign out.
10:14
Ah!
10:16
Classic teacher Hannah, yo!
10:18
Give me that hall pass.
10:21
All you. Five minutes.
10:23
I’m gonna need 15.
10:25
( laughing )
10:27
Sorry. ( snorts )
10:28
Class is over, and you did great.
10:31
You want to get some extra credit?
10:33
Hit the subscribe button so you’ll never miss
10:35
a “Celebrity Substitute” lesson right here on YouTube.
—
Don’t like ads? Become a supporter and enjoy The Good Men Project ad free
This post was previously published on YouTube.
***
If you believe in the work we are doing here at The Good Men Project and want a deeper connection with our community, please join us as a Premium Member today.
Premium Members get to view The Good Men Project with NO ADS. Need more info? A complete list of benefits is here.
—
Photo credit: Screenshot from video