The phrase "tissue specimens" refers to small pieces or samples of body tissues that are taken from a person during a medical procedure for examination or testing. Full definition
They also collect fluid samples and tissue specimens for laboratory testing. (learnhowtobecome.org)
Multiple tissue specimens should be submitted to a laboratory for virus isolation, bacterial culture, and microscopic examination. (lowchensaustralia.com)
I am extremely knowledgeable in fixing blood / tissue specimens on slides, using lab machines and performing preventive measures. (coverlettersandresume.com)