Your bladder holds pee until you're ready to go. Big umbrella cells line the inside and keep it all sealed in.
Drag to turn it around. Use the buttons to zoom in and try things from the lessons.
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Your bladder is a stretchy bag that stores pee. Its inside is lined with a few layers of cells.
The top layer, the one touching the pee, is made of umbrella cells. They are big and wide. Each one can cover several smaller cells beneath it, like an umbrella.
Umbrella cells are some of the biggest cells lining your body. Some even have two nuclei!
Press Fill the bladder on the 3D model and watch the umbrella cells flatten.
By Operation Ouch. A fun video for kids.
Watch on YouTube →