What is a test tube and how is it used?

A test tube is a clear, cylindrical glass tube generally open at one end and rounded at the other, used in laboratory experimentation.

Test tubes are usually used for combining or collecting chemicals. They are used in a vast range of experiments by in big industry it is boiling tubes, which are more commonly used.

Test tubes have been notably used, of course, in the production of the world's first IVF baby. In Vitro Fertilization literally means 'in glass' fertilization