Kidneys, Kidney Stones, and Tears (S01E06)

Red Blood Cells AA2153 and AC1677 are settling into their roles and even find time to share some laughs during breaks. They make their way to the kidneys to cleanse themselves of the grime from their work, where they encounter the Glomeruli, who quietly filter the blood. A young Glomerulus cautions one of the Red Blood Cells to watch out near the ureter. Upon reaching the efferent arteriole, they hear a troubling noise indicating something is obstructing the nearby ureter…