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  • It's AumSum Time.

  • What is blood pressure?

  • It's a form of acupressure.

  • No.

  • In order to deliver oxygen and nutrients.

  • To each and every cell of our body.

  • 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.

  • The ideal blood pressure reading is.

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

  • But why does the reading have 2 numbers?

  • It is because our heart is constantly contracting and relaxing.

  • During a phase called systole.

  • Our heart contracts to push the blood through arteries.

  • Thus increasing the pressure.

  • 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.

  • How does blood clot?

  • With the help of glue.

  • Not at all.

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

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

  • Hey.

  • I too have a plasma, look.

  • Oh.

  • Please listen.

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

  • Our blood begins to form a clot.

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

  • Thus forming a loose plug.

  • But this plug is not enough to stop bleeding.

  • Hence, the clotting factors take part.

  • 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.

  • Why is blood red in color?

  • Because everyday it bathes using red paint.

  • No.

  • Our blood mainly consists of.

  • 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.

  • Hemoglobin is an iron rich protein.

  • When hemoglobin binds with oxygen.

  • 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.

  • Which give their blood a green color.

  • Blood Rain.

  • Relax.

  • Blood rain has red colored water droplets.

  • There are various reasons behind this.

  • Around Sahara Desert.

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

  • Giving rain its brownish red color.

  • 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.

  • Causing blood rain.

It's AumSum Time.

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