Final answer:
The kidneys are responsible for removing nitrogenous wastes like urea from the bloodstream, which are then excreted in the form of urine.
Step-by-step explanation:
The animal body part responsible for removing nitrogen is the kidneys. Urea, which is a nitrogen-containing molecule, is produced when protein-containing foods are broken down in the body. This urea, along with other wastes, is transported to the kidneys, where it is removed from the bloodstream and forms urine. The excretory system includes organs such as the skin, liver, large intestine, lungs, and kidneys, each playing a unique role in waste elimination. However, when it comes to specifically removing nitrogenous wastes like urea, the kidneys are the primary organs responsible for this task.
Learn more about Excretory system