Test tube
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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 or longer of glass or clear plastic tubing, open at the top and c
Two small test tubes held in spring clamps
Louis Lumière with a microscope and some test tubes
Samples of human blood collected for blood tests
Vacutainer
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A vacutainer blood collection tube is a sterile glass or plastic test tube with a colored rubber stopper creating a vacuum seal inside of the tube, facilitating the drawing of a predetermined volume o
Test tube
…that the presence of a lip is what distinguishes a test tube from a culture tube. In clinical medicine, sterile test tubes with air removed, called vacutainers, are used to collect and hold samples of physiological fluids such as blood, urine, pus, and synovial fluid. These tubes are commonly sealed with a…
Drawing blood from the median cubital vein using a vacutainer. The clear plastic sheath around the top of the tube holds the needle. The orange guard will shield the needle after it is withdrawn from the patient to protect from accidental needle stick injury.
A tiger top tube after centrifugation to separate blood cells from serum
Vacutainer blood tubes
Blood collection tubes are among the basic medical supplies taken by disaster relief programs to affected areas.