pelvis
The pelvis filters out the food you eat. So it basically poops out your food
The renal pelvis collects urine filtrate from the collecting tubules.
They belong to the nervous system
The kidneys belong to the excretory system.
Veins belong to the circulatory system, because they transport blood there for they belong to the circulatory system.
The bones belong to the skeletal system.
The eyes belong to the Nervous system.
Arteries and veins belong to the cardiovascular system.
The lungs belong to the Respiratory System.
The dura mater belong to the craniosacral system.
Sweat glands belong to the integumentary system.