Excretory System

Vocabulary Kidneys – Two bean-shaped organs that remove most of the extra water and cell wastes from your blood Urine – The liquid waste filtered from the blood by the kidneys Ureter – A narrow tube that comes out of each kidney and connects to the urinary bladder Urethra – A tube connected to the bladder that releases urine outside of the body

How does the urinary system get rid of waste? Made up of kidneys, bladder, and tubes – all hold liquid waste Kidneys are in your back at about waist level, look like 2 beans Remove most of the cell wastes and extra water from the blood Water and waste combine to form urine

Continued A narrow tube called the ureter comes out of each kidney and connect to the urinary bladder (bag-like) Bladder fills with urine and then is released through a tube called the urethra

How does your skin help get rid of waste? Sweat glands remove water, salt, and other waste from the blood in the form of perspiration, or sweat Sweat leaves your body through small openings in the skin called pores, water in the sweat evaporates, other wastes stay on skin until you wash them away

Continued The excretory system helps keep wastes from remaining in your body, which keeps your cells healthy

Lesson 4 Review What is the job of your excretory system? What does your urinary bladder do? How do the sweat glands remove wastes from your body?

Lesson 4 review