Question

1. what body system includes the kidneys, bladder, and urethra?

endocrine system
integumentary system
muscular system
immune system
urinary system

Explanation:

The endocrine system is for hormone regulation. The integumentary system involves skin, hair, etc. The muscular system is for movement. The immune system defends against pathogens. The urinary system's main organs are kidneys (filter waste), bladder (store urine), and urethra (excrete urine), so it includes these structures.

Answer:

E. Urinary system