pumped out of the heart via arteries.) ac How many chambers does the human heart have? (Four.) Follow-Up: Have children locate the pulse in their wrist. If a stethoscope is available, let them check their heartbeat and compare it with the pulseanbsp;...
|Title||:||The Macmillan science series|
|Author||:||John Darrell Barnard, Celia Stendler, Benjamin Spock|