Topic: lungs

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Oxygen’s surprisingly complex journey through your body

Oxygen forms about 21% of the air around us. In your body, oxygen forms a vital role in the production of energy in most cells. But if gases can only efficiently diffuse across tiny distances, how does oxygen reach th...

Scorpion evolution, scorpion moms, & glowing scorpions

Scorpion facts: Scorpions have been on Earth for 400 million years, scorpions give birth to live young and then catch them in their arms, and under ultraviolet light, scorpions fluoresce. Scientist and Cal Academy Cur...

How does the heart pump blood? – TED Ed

"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 ...

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...

The circulatory system: How blood is transported through our bodies

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 contracts, pushing red blood c...

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