Filters, Muscles and Toilets: teacher key

Poop and Pee, grade 6 edition, written for 6th grade. Look at the long tube that makes poop, the tiny filters that make pee, and the muscles that let you choose when to go. Then travel from Mohenjo-daro to castles and the water closet.

Read the book. Print this page for the key.

Questions and answers

1. About how many nephrons does each kidney have?
   • Two
   • A million (answer)
   • Ten
2. What do the ureters do?
   • Hold poop in the rectum
   • Make bile
   • Carry pee from the kidneys to the bladder (answer)
3. What is a sphincter?
   • A ring-shaped muscle that keeps an opening closed (answer)
   • A filter in the kidney
   • A kind of sewer
4. Pee is dark yellow and smells strong. What is it a rough clue to?
   • Your liver has stopped working
   • Your body may have less water (answer)
   • Your anus is open
5. What did castles have for emptying waste?
   • Water closets
   • Glomeruli
   • Shafts (answer)

Words

• nephrons: tiny kidney filters
• glomerulus: a nephron's filter
• sphincters: ring-shaped muscles
• ureters: kidney-bladder tubes
• cesspits: holes for waste