You have multiple answers but it's excretory. It's not really the endocrine system although the adrenal glands (located right on the kidney) are in the endocrine system.
There is absolutely an excretory system and it's not just the kidneys that are involved but the lungs (excrete co2) the intestines (digestive yes but also excrete waste) and obviously the kidney, bladder, ureters and urethra.
-darlene de la rosa2992
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 eyes belong to the Nervous system.
Arteries and veins belong to the cardiovascular system.
The lungs belong to the Respiratory System.
Livers of all animals belong to the digestive system.
what part of of organ system that the skin belong
The digestive system.
Mixed Economy
Tendons belong to the musculoskeletal system in the human body.
The nose, larynx and lungs belong to the respiratory system