Name: 血圧とは？| 話題の「血圧」について｜#aumsum (What is Blood Pressure? | #aumsum)
Uploaded: 2021-01-14T08:20:37.000Z
Duration: 3 min 54 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：

In order to deliver oxygen and nutrients.

Our heart pushes blood through tubes called blood vessels.

As the blood moves, it exerts force on the vessels' walls.

The measurement of this force of blood on the walls is called blood pressure.

About 120 over 80 millimeters of mercury or slightly below it.

It is because our heart is constantly contracting and relaxing.

Our heart contracts to push the blood through arteries.

So, the bigger number indicates the systolic blood pressure.

Whereas during diastole, our heart relaxes, decreasing the pressure.

So, the smaller number indicates the diastolic blood pressure.

Our blood consists of red blood cells, white blood cells.

Platelets, clotting factors, etc. suspended in a liquid plasma.

Usually, when a blood vessel gets ruptured and we bleed.

First, the platelets start sticking to the broken vessel and each other.

But this plug is not enough to stop bleeding.

In a complex chain of chemical reactions and create fibrin strands.

These strands criss-cross one another and create a mesh.

That tightly holds the loose plug together and makes it strong.

Red blood cells and white blood cells also get trapped in the mesh.

Thus creating a blood clot that completely stops bleeding.

Because everyday it bathes using red paint.

A liquid called plasma, red blood cells, white blood cells and platelets.

However, the color of our blood is basically because of red blood cells.

Each of the red blood cells contains hemoglobin.

The interaction between them gives our blood its red color.

Moreover, like human beings, not all animals have red color blood.

This is because the blood of some animals.

Such as octopuses, spiders, etc. has hemocyanin instead of hemoglobin.

Hemocyanin is a copper containing protein.

When hemocyanin binds with oxygen, their interaction gives the blood a blue color.

The blood of some lizards has biliverdin instead of hemoglobin.

Blood rain has red colored water droplets.

Brownish dust and sand carried by storms mix with water droplets in clouds.

In Kerala, red spores of algae called Trentepohlia Annulata.

Got carried by wind and mixed with water droplets, causing blood rain.

While, in Zamora, Haematococcus Pluvialis algae got caught in rainclouds.

Got stressed and produced a red pigment called astaxanthin.