Test tube

A test tube (Sometimes culture tube) is a kind of laboratory glassware, composed of a fingerlike length of glass tubing, open at the top, sometimes with a rounded lip at the top, and a rounded 'U' shaped bottom.

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They range in size from a few centimeters to over 20 centimeters in length and from a few millimeters to several centimetres in diameter. They are designed to allow easy heating of samples, to be held in a flame, and often are made of expansion-resistant glasses, such as Pyrex.

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Tests tubes are often preferred above beakers when multiple small chemical or biological samples have to be handled and/or stored.

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Vacutainers are a type of test tube that can be used for both collection and storage of blood.

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The use of test tubes in experiments of biology and chemistry were once so ubiquitous they, along with erlenmeyer flasks and beakers, became synonymous with scientific experimentation as a whole and used as icons of all scientific pursuit.

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Laboratory glassware: Laboratory glassware refers to a variety of equipment, traditionally made of glass, used for scientific experiments in chemistry and biology. Some of the equipment is now made of plastic for cost and convenience reasons, but glass is still used for some applications because it is relatively inert, ...

Length: In general English usage, length (symbols: l, L) is but one particular instance of distance – an object's length is how long the object is – but in the physical sciences and engineering, the word length is in some contexts used synonymously with "distance". Height is vertical distance; ...

Glass: :For eyeglasses, see glasses. For the drinking vessel, see glass (drinkware)....

Test tube related Images and Photos (experimental)

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