Histology studies microscopic structure of cells, tissues and organs. Cells are smallest functional units of organisms with nucleus and cytoplasm. Cells are enveloped by semipermeable two-layered membrane
Tissue is an aggregate of cells with similar structure and function. Histology studies tissues using microscopes. Cells in multicellular organisms usually function together
Protocol applies to primary lung cancer resections and tumors. Version 4.0.0.2 released in June 2017. Requires synoptic reporting format for accreditation purposes
Tissue is an assembly of similar cells from same embryonic origin performing specific function. Biological organisms follow hierarchy: cells, tissues, organs, organ systems, organism. Xavier Bichat introduced term "tissue" in 1801, considered "Father of Histology"
Peroxidases break down peroxides in biological processes. Most active with hydrogen peroxide, some with organic hydroperoxides. Contain heme cofactor or redox-active cysteine/selenocysteine residues. Structure determines electron donor specificity
Staining enhances contrast in microscopic samples. Used in histology, cytology, and medical fields for disease diagnosis. Can define tissues, cell populations, and organelles