Final answer:
Blood, urine, sputum, feces, and tissue samples are considered clinical specimens, used for lab analysis to help diagnose and monitor health conditions.
Step-by-step explanation:
Blood, urine, sputum, feces, or tissue samples are considered to be clinical specimens. These are materials collected for laboratory analysis to diagnose and monitor diseases or conditions. For example, blood tests can measure levels of various metabolites in plasma, urine tests can reveal information about one's health by analyzing proteins, red blood cells, bacteria, and other components, and sputum samples can help detect respiratory infections by identifying specific pathogens under a microscope.