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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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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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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Erythrocytes (red blood cells) moving through a capillary in single file. Erythrocytes (red blood cells) moving through a capillary in single file.
Files come in many different shapes and sizes. Never use a file without a handle. Files come in many different shapes and sizes. Never use a file without a handle.
A scope display showing a normal Chevrolet Equinox MAF sensor at idle speed. the frequency is 2,600 ... A scope display showing a normal Chevrolet Equinox MAF sensor at idle speed. the frequency is 2,600 ...
How to choose the right payment plan with changing conditions (Question 4) How to choose the right payment plan with changing conditions (Question 4)
Display of Canapés Display of Canapés
Video: Body plan of euglena Animation

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