The answers are:
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1. |
More than a quart. You need lots of saliva, because it has plenty of word to do. Without saliva you could talk and swallow only with great difficulty. | ¡@ |
| 2. | Hairs on your head. The average head hair lasts between two and eight years--about ten times as long as eyelash (and eyebrow hairs too). | ¡@ |
| 3. | The middle finger. The longer the finger, the faster the nail grows. | ¡@ |
| 4. | False. The heart can beat completely on its own, even after it is removed from the body. In fact, strips of heart muscle in a test tube--even individual cells--beat as long as they are surrounded with proper nutrients. | ¡@ |
| 5. | Human bone. Human bone has a compressive strength greater than reinforced concrete or marble. The secret is calcium (which is actually a metal) compounded with phosphorus and oxygen into a concrete-like material. | ¡@ |