The Excretory System Answers

Use the drop-down menus to match the following descriptions to the structures and wastes of the excretory system. spongy and elastic saclike organs that allow the inhalation of oxygen and exhalation of carbon dioxide.

the thin layer of tissue forming the natural outer covering of the body of a person or animal.

the organ of the body that is the site of reabsorption of water and the processing of undigested material into feces.

The large intestine produces

Urine is produced in the nephrons of the kidneys.

Urine that is produced in the kidneys flows down the urethra to the bladder for storage and then is excreted through the ureters.