Name: 妊娠生理学I (Pregnancy physiology I | )
Uploaded: 2021-01-14T07:07:39.000Z
Duration: 10 min 25 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Well, I guess you could say
that it takes an entire body,

It's like the best example
of teamwork that there is,

all the organs in the
body working together

to support the growth and
the development of the fetus,

that mom's body isn't
sacrificing its own needs

undergoes a significant amount of change.

And I wanna go through
what those changes are.

So let's start with the
cardiovascular system,

so the heart and the blood
vessels throughout the body.

And, I guess you could
say, at the very basic,

most essential, level,
the body needs more blood

to carry oxygen and those
nutrients to the fetus.

So the blood volume increases by something

like 40 to 50 percent
throughout the pregnancy.

And it's not just that there's more blood.

to more efficiently supply
that blood to the fetus.

So, for example, the
heart beats more quickly.

And the stroke volume,
so the amount of blood

that's pumped out with
each heartbeat, increases,

out of the heart each
minute, also increases.

So in summary, more blood is
being pumped out of the heart

I'm gonna guess that you guys
guessed that it increases,

because that's certainly
what I thought happened.

And it decreases for a
couple of different reasons.

floating around in the
blood during pregnancy.

And, if there's something
that progesterone

does really well, it
relaxes smooth muscle.

of the decrease in blood
pressure through pregnancy.

to the lower blood
pressure is the placenta,

which is an addition of
an entirely brand-new

blood vessel circuit to
the circulatory system.

It's like when you add
a resistor in parallel,

reducing the resistance
of the entire circuit.

I'm just joking. That doesn't help anyone

and what would happen to the
pressure in the shower heads

if you added a whole
additional floor of apartments,

the cardiovascular
system, there's a syndrome

that's called Supine,
it's called Supine ..

"Supine" means when
you're lying on your back,

Supine Postural, so it's Supine Postural,

Syndrome, so Supine Postural
Hypotensive Syndrome.

And it's weird that I'm
talk about a syndrome

in a video that's talking about
physiology during pregnancy.

But I guess you could
say, it's a syndrome,

And since the inferior
vena cava gathers the blood

the compression of the inferior vena cava

means that less blood is
pushed back to the heart,

meaning that less blood is
pumped out with each heartbeat.

And that leads to low blood
pressure, or hypotension.

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妊娠生理学I (Pregnancy physiology I | )

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