Friday, February 5, 2010

Friday Fun: Five Gross and Goofy Body Facts

  • When a spider molts, or sheds its skin, its heart pumps extra blood into the front of its body. The blood pushes on the old skin until it cracks open.
  • In winter, a wood frog’s heart stops beating—for weeks. But the little leaper isn’t dead. The warm days of spring jump-start its heart.
  • A Burmese python needs extra pumping power to digest large prey. Luckily, its heart can bulk up 40 percent in just two days.

  • Pound for pound, seals have up to 50 percent more blood than people. And because a seal’s red blood cells can store more oxygen, they can stay underwater for over an hour. Most people can only hold their breath for about a minute.
  • In some countries, people enjoy eating the hearts of cows, sheep, and pigs. And you can find chicken hearts in some North American grocery stores. Some people say the mighty muscle tastes like a nice, juicy steak, but you might want to stick with PB&J.
Looking for more Gross & Goofy Body facts about the heart and blood? Check out my new book Pump It Up: The Secrets of the Heart and Blood. To find out more about the whole Grosss and Goofy Body series, read this very thorough review from School Library Journal.


  1. Thanks for sharing these "gross" facts! We loved them as we have just finished Diary of a Spider--a perfect connection. Looking forward to hearing more from you.

  2. Diary of a Spider is a great book. I'm so glad you and your students could make a connection.

  3. Great heart facts just in time for Valentine's Day!

  4. Great heart facts just in time for Valentine's Day!

  5. I wish I had thought about Valentine's Day when I posted these. Maybe I should have saved them for next Friday.