Which are structures of the excretory system? check all that apply. kidney spleen bladder esophagus ureter urethra

The organs listed above are all part of the excretory system except for the spleen and the esophagus.
The kidneys act to filter our blood, and remove wastes, which eventually pass out of us through urine,
The bladder acts to collect and store urine until it can be emptied through urination.
The ureter runs from the kidneys to the bladder whereas the urethra runs from the bladder to exit the body.

The correct answer is  b)