Author: Dr. Alka Mishra, Maya Devi
Volume: 01
First Online: 2026
Pages: 1-29
DOI:

This chapter introduces the fundamental principles and applications of microscopy and microtomy, which are indispensable techniques in biological and biomedical sciences. It provides a comprehensive overview of different types of microscopes, including bright-field, dark-field, phase-contrast, fluorescence, electron (SEM and TEM), and confocal microscopes,
highlighting their principles, instrumentation, advantages, limitations, and research applications. The concepts of magnification, resolution, and numerical aperture are explained to help readers understand image formation and microscopic analysis. The chapter further discusses microtomy, emphasizing tissue preparation techniques such as fixation, dehydration,
clearing, embedding, sectioning, staining, and permanent slide preparation. Various types of microtomes, including rotary, rocking, cryostat, vibrating, sliding, and ultramicrotomes, are described with their working principles and practical significance in histopathology and research laboratories. Special attention is given to the preparation of high-quality tissue
sections required for microscopic examination and disease diagnosis. By integrating theoretical concepts with laboratory procedures, this chapter equips students and researchers with the essential knowledge required for specimen preparation and microscopic investigation in life sciences, pathology, microbiology, and pharmaceutical research.