The Principal Cells and the Collect Induct

There's two main types of cells here. We've got cells called principal cells and cells called intercalated cells. The function of the principal cells is that they... The boss, the boss man. That's right. They reabsorbs sodium and water back into the blood and they secrete potassium into the filtrate. Do you know what chemical acts here? Aldosterone. So aldosterone sort of increases this function from happening. Okay. Now we move down finally into the collect induct. Yeah. This is the final place that we can do anything before it becomes toilet water. You're in where you're in where? You are in where? I don't know.