Flexi Says: The organs of the excretory system are also parts of other organ systems. For example, your lungs are part of the respiratory system. Your lungs remove carbon dioxide from your body, so they are also part of the excretory system. The sweat glands in skin remove water, salts, and other wastes which comes in integumentary system. Large intestine removes solid waste and some water in the form of feces which comes in digestive system and kidneys, which is a part of urinary system remove urea, salts, and excess water from the blood.