Chapter 7

7 HE PANZER TANK ROLLS OVER A SMALL ARMY OF NEON-GREEN T T jittering bugs and pushes the purple monster truck into the corner of the lab. "I've got you now!" hoots Watson. "Demolition Derby!" "You wish," says Klank. He turns his monster truck wheels, hits full power, and escapes by rolling his big tires right over the top of Watson's tank.

Frank scratches his head with one hand and checks the math on his blueprint with the other. Watson jams his tank into fast reverse. He tries to slam Klank's truck but misses and smashes a rainbow-hearted pony. "Raaahhhhhr!" roars a one-legged T. Rex. "Wee tah kah loo-loo," moans a one-eyed purple Furby, wriggling on its back. Klank spins his monster truck around to face Watson's tank.

Watson turns the Panzer turret to aim its cannon right at Klank's truck. "Come on, you guys," says Frank. "We need your help." Watson and Klank count down together: "Three... two... one!" and forward-charge each other. The monster truck plows over the T. Rex. The tank plows through the Furby. And all four—truck, T. Rex, tank, and Furby— crash in one giant pileup and land in a motionless heap. "Yeah!" cheers Watson. "Who wins?" asks Klank. From somewhere under the toy wreck pile, the Furby says, "Doo doo yoo yoo," and with a bzzzzzzt, shorts out. Frank Einstein digs through a pile of medical charts and models and posters. He chews the eraser end of his pencil. He scratches his head. He thinks. He unrolls a poster. "OK—here's another system we could

boost for more power."

"The circulatory system. The heart and all the blood vessels that deliver energy and oxygen to the muscles and organs," reports Klink, after instantly reading a whole stack of medical encyclopedias in exactly three seconds. "Blood is pumped away from the heart in arteries. Blood is returned to the heart in veins." With his chewed pencil, Frank traces the path of blood in a heart-lung diagram. "The heart pumps blood to the lungs. That blood picks up oxygen and goes back to the heart, then out to the rest of the body."

Janegoodall drops her hat on the lab table. She looks at the heart diagram and gives a whistle. "Woowwww. The heart is a crazy, complicated thing!" "The human heart is about the size of two hands held together. It beats one hundred thousand times a day. It pumps one and a half gallons of blood every minute. The heartbeat is