"Tissue sections" refers to thin slices of living or preserved tissues that are examined under a microscope to understand their structure, composition, and characteristics. Full definition
It can be done on tissue sections (fresh or fixed tissue), cell suspensions, and so on. (sciencemag.org)
Examination of tissue sections by immunofluorescence microscopy showed a loss of Cxcr6GFP / + cells from the SCS following FTY720 treatment (Figure 5F). (elifesciences.org)
Visualization and analysis of gene expression in tissue sections by spatial transcriptomics Patrik L. Ståhl, Fredrik Salmén, Sanja Vickovic, Anna Lundmark, José Fernández Navarro, Jens Magnusson, Stefania Giacomello, Michaela Asp, Jakub O. Westholm, Mikael Huss, Annelie Mollbrink, Sten Linnarsson, Simone Codeluppi, Åke Borg, Fredrik Pontén, Paul Igor Costea, Pelin Sahlén, Jan Mulder, Olaf Bergmann, Joakim Lundeberg, Jonas Frisén. (scilifelab.se)