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Author Question: The air cells of the lungs are the: A) cilia. B) pleura. C) alveoli. D) ... (Read 40 times) |
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Thyroid conditions may make getting pregnant impossible.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.