• The emergence of a unified 3D bioprinting paradigm, grounded in explicit process classification, multi-material construct capabilities, and early demonstrations of lung, retina, and tumor microenvironment models, signaling a transition toward programmable tissue fabrication [6], [7], [9], [12], [14], [15].

• Biomaterial design and surface functionalization for biofabrication, spanning covalent enzyme coupling to collagen films, polymeric hydrogels, conductive composites, and mapping of anionic sites to guide cell–matrix interactions [2], [5], [15], [17], [18], [19].

• Tissue processing and imaging methodologies enabling TEM and histology of frozen, hydrated, and plastic-embedded tissues, reflecting standardized sample-preparation workflows that underpin structural studies [1], [4], [16], [20].

• Bioreactors and scalable production in biotechnology highlight early forays into industrial bioprocessing, immobilized-cell systems, and continuous product synthesis [10], [11].

• Collagen mechanics and electro-mechanical signaling in matrices link electrostatics, tensile forces, and biosynthesis, underscoring matrix biomechanics as a design driver [2], [13], [15], [19].