Topic: heart

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TED Ed: How does the heart pump blood?

"For most of history, humans had no idea what purpose the heart served... although everyone could feel their own heart beating, it wasn't always clear what each thump was achieving... Even in the 21st century, only a ...

Banggai Cardinalfish eggs

Despite what it looks like, this is not a short clip from a Hayao Miyazaki film. These are banggai cardinalfish eggs with still-forming fish inside. Their eyes are quite clear. Can you see their heartbeats? These t...

The tiny glass frog of Costa Rica

The size of a human fingernail, this tiny glass frog in Costa Rica is a wonder to watch. In this clip from the Discovery Channel’s Speed of Life, you can see the glass frog’s rice g...

Why Red Blood Cells Look Like Donuts

This week, the 5 year old discovered the science videos of Bite Sci-zed’s Alex Dainis, starting with this one: Echinoderm Show & Tell. When he immediately asked for more, we watched The Gas Laws, Dishes and...

Papa Cloudy by Akiko McQuerrey

Enjoy the wonderful stop-motion adventures of Papa Cloudy, created by Brooklyn-based Akiko McQuerrey.

The circulatory system

The circulatory system consisting of the heart, arteries, capillaries, and veins, is the pumping mechanism that transports blood throughout the body. In the heart, the left ventricle contra...