It's Valentine's Day and I don't have a Valentine.
Hola mi amor. [Hello, my love.]
Un osito de peluche. [A teddy bear.]
Okay, you guys, so, for this one,
I'm going to be making the initial incision
right here on his chest,
that's between the clavicle.
We're gonna be cutting down,
kind of like how we did the wolf
we'll be following the line of his sternum,
and probably cutting down here to around the pubis.
Alright, first incision,
right here.
This is...
pretty good.
Let me grab my tweezers.
He cuts open fairly well. I wasn't anticipating this...
oh, I've, we got some viscera
right here.
Let's keep going.
Some of this...
get some of this material out of here.
Not entirely sure what that compound is.
Seems inorganic.
And, um, looks like...
right here
we have...
the heart.
I'm gonna be cutting along his clavicle just to open him up a little bit better.
So I can get access to this muscle.
Oh god.
That's gorgeous. That is beautiful.
I think I can just... If I just clear around...
little bit... this way...
Keep coming down...
Here we go!
We have the heart!
The heart, as we know, is commonly associated with feelings of love.
and this goes back to ancient times
when philosophers and, uh, early physicians believed
that the heart was the source of all love.
Not necessarily the brain as we know it now.
The heart itself is a muscle.
It's an incredibly dense muscle, it's hollow, as you can see.
It's the heart of a bison,
it's not actually the heart of a teddy bear,
I feel like I should be quite honest with you in that regard.
So, we got it from a butcher shop
and they cleaved the top of the heart from it.
Um, in order to get rid of the valves and the aorta.
People will eat hearts. People still eat hearts
and they use them to make dog food.
So that's why this was at a butcher shop.
In any case, the heart is comprised of four different parts.
It has the top two, the left and the right atrium
and then the bottom two, the left and the right ventricles.
The right side is the blood that is going to the lungs
in order to become reoxygenated.
The blood from the left side
goes through the aorta to every other part your body
and you can see on this heart how much larger the left side is than the right side.
So it's going to get pumped out through the aorta
and go to every other part of your body
and then come back through on the right side
become reoxygenated, then eventually end up
again on the left side where it is expended
comes in the repository, becomes reoxygenated
and the cycle continues throughout your circulatory system.
The size of a vertebrate's heart is going to be somewhat relative
to the size of the animal itself.
And not only that, there are a lot of different factors involved.
Uh, whether or not it's a cold-blooded or warm-blooded animal,
how much it moves, is it dormant.
A humming bird has to have an incredibly rapid heart rate
in order to fuel all the blood that they require to their wings
in order for them to beat so quickly.
On the opposite side of the spectrum,
a blue whale's heart is roughly the size of a compact car
and will only beat around 2 to 7 times a minute.
It has to pump 7 tons of blood throughout its entire body.
A human's heart will beat anywhere between 70 and 90 times a minute,
depending on how healthy you are and how much exercise you get
and other physiological differences between humans.
That's 103,000 times a day.
36,000,000 times a year
and 2.4 billion times throughout your life,
if you live to the age of 65.
So the moral of the story is:
be good to your heart.
And don't you dare break mine.