Test tube

Samples of human blood collected for blood tests.

Eight cavity test tube mold courtesy of Lake Charles Manufacturing.

A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top, usually with a rounded U-shaped bottom.

A large test tube specifically for boiling liquids is called a boiling tube.

单词	Conical tube
释义	Conical tube 英语百科 Test tube A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top, usually with a rounded U-shaped bottom. A large test tube specifically for boiling liquids is called a boiling tube.
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Conical tube

Test tube