Bladder Station: The closest resemblance to the excretory system within the film is "Bladder Station," a bustling hub at the bottom of the body. While not explicitly represented as the bladder itself, it serves as a processing center for waste products, with Mayor Phlemming presiding over operations. We see cells delivering toxins and fluids there, highlighting the bladder's role in collecting and storing urine.
Sweating Scene: When Frank exercises, sweat pours from his pores, represented by tiny workers pushing waste products out of the body. This depicts the skin's function in eliminating toxins through perspiration.
Kidneys: During the "Zit Bar" sequence, where Thrax feasts on sugar, Dr. Kidney arrives to complain about increased workload. This alludes to the kidneys' role in filtering waste from the blood, a process that can be overloaded by excessive sugar intake.
