Overview
It's time for a heart-to-heart talk about blood and circulation with Bill Nye the Science Guy. Your blood is your bud. Without blood, your skin would dry up and fall off, your internal organs would die, and your brain would be kaput. Blood gives every cell in your body the food and oxygen it needs to survive. Blood also cleans up after our cells by carrying away waste. Blood even protects your body from disease. What more could you ask from a friend? Blood patrols your entire body. Blood is pushed around by a powerful pump called the heart. Every time your heart lub-dubs, blood is propelled through tubes called arteries, capillaries, and veins. Your heat pushes your blood in a complete loop around your body about 2,000 times every day. Your heart is a muscle, and, like all muscles, it can get stronger. A healthy heart needs exercise to stay strong. An average heart pumps about 70 times a minute, but a healthy, well-exercised heart pumps 50 or 60 times a minute. Heal
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2 - 1Magnetism February 18, 1994 -
2 - 2Wind February 25, 1994 -
2 - 3Blood & Circulation March 04, 1994 -
2 - 4Chemical Reactions March 11, 1994 -
2 - 5Static Electricity March 18, 1994 -
2 - 6Food Web March 25, 1994 -
2 - 7Light Optics September 10, 1994 -
2 - 8Bones & Muscles September 17, 1994 -
2 - 9Oceanography September 24, 1994 -
2 - 10Heat October 01, 1994 -
2 - 11Insects October 08, 1994 -
2 - 12Balance October 15, 1994 -
2 - 13The Sun October 22, 1994 -
2 - 14Brain October 29, 1994 -
2 - 15Forests November 05, 1994 -
2 - 16Communication November 12, 1994 -
2 - 17Momentum November 19, 1994 -
2 - 18Reptiles November 26, 1994 -
2 - 19Atmosphere December 03, 1994 -
2 - 20Respiration January 07, 1995