32.4 Excretory System The excretory system eliminates nonsolid wastes from the body. skin lungs kidneys ureters urinary bladder urethra

32.4 Excretory System Skin Sweat glands excrete water, salts, small amount of urea skin

32.4 Excretory System Lungs Excretes carbon dioxide and water vapor lungs

32.4 Excretory System Ureters Transport urine from each kidney to bladder ureters

32.4 Excretory System Bladder Urine storage urinary bladder

32.4 Excretory System Urethra Tube where urine is released urethra

32.4 Excretory System Kidneys Filter blood by removing excess water, urea, and wastes (urine). kidneys

32.4 Excretory System Nephrons Filtering units in the kidney Tiny tubes surrounded by capillaries from body to body Collecting Duct from other nephrons loop of Henle

32.4 Excretory System Nephrons clean the blood in 3 steps. FILTRATION Water,electrolytes,aminoacids, glucose,urea, and other small molecules diffuse out of the blood,creating the filtrate. 1 Glomerulus Bowman’s capsule

32.4 Excretory System from body to body collecting duct from other nephrons loop of Henle REABSORPTION As the filtrate enters the rest of the tubule, most of the materials are reabsorbed into the blood. Materials not reabsorbed make up the urine, which flows into the loop of Henle. 2 EXCRETION In the loop of Henle, water can be reabsorbed one final time to reduce the volume of urine. The remaining urine flows into a collecting duct that leads to the ureter. 3

32.4 Excretory System Dialysis can be used to filter and clean the blood if you have kidney failure.