Uploaded August 2026 | Updated September 2026, 2 weeks ago

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khanacademy.org/science/telangana-class-10-biologyin?lang=en

Did you know that a simple wooden tube transformed how we
listen to the human body?In this video, we learn about the tiny
flutter felt on our wrists, the pulse.

Have you noticed that the
flutter is in rhythm with the ""lub-dub"" of a beating heart?
With a simple DIY clay-and-toothpick demo you can try at
home, we can visually track your own heart rhythm in real-time.

We will also discuss the fascinating story of René Laennec,
who rolled up a sheet of paper to invent the world's very first
stethoscope. #KhanAcademy #Grade10 #Pulse "

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

Timestamps:
00:00 - Introduction
00:23 - What is this on my wrist?
00:45 - Pulse
00:55 - Different parts where pulse can be felt
01:15 - Measuring the pulse
01:47 - Pulse varies across people, situations & age
02:37 - Pulse indicator
03:33 - Why do we feel the pulse?
04:01 - Pulse = heartbeat?
04:13 - Invention of stethoscope

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