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.

Related Topics:
Laboratory glassware - Length - Glass

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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.

Related Topics:
Centimeters - Millimeters - Diameter - Flame - 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.

Related Topics:
Beaker - Chemical - Biological

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

Related Topics:
Vacutainer - Collection - Storage - 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.

Related Topics:
Biology - Chemistry - Ubiquitous - Erlenmeyer flask - Beaker - Synonymous - Experimentation - Scientific pursuit

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