Your kidney filters lots of fluid out of your blood, including good stuff your body needs. These cells grab most of it back.
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After fluid leaves a kidney filter, it flows into a twisty tube. The first part is the proximal convoluted tubule. Proximal means near, and convoluted means twisty.
Its cells are shaped like little blocks. Their tops are covered in thousands of tiny fingers, called a brush border.
They are also packed with mitochondria, the cell's power makers.
Your kidneys filter a huge amount of fluid every day. Without these cells, you would lose most of it as pee!
The filtered fluid still has things your body needs. These cells grab them back and pass them into the blood:
All that grabbing takes lots of energy. That is why they have so many mitochondria.
Press Take back the good stuff on the 3D model.
By Operation Ouch. A fun video for kids.
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