Ultrastructural Pathology of the Cell and Matrix: Third Edition Volume I present a comprehensive examination of the intracellular lesion. It discusses the analysis of pathological tissues using electron microscope. It addresses the experimental procedures made on the cellular level. Some of the topics covered in the book are the physiological analysis of the nucleus; nuclear matrix, interchromatin, and perichromatin granules; structure and function of centrioles; characteristics of mitochondria; Golgi complex in cell differentiation and neoplasia; and degranulation of rough endoplasmic reticulum. The intracytoplasmic and intranuclear annulate lamellae are fully covered. An in-depth account of the classification, history, and nomenclature of lysosomes are provided. The morphology and normal variations of melanosomes and anchoring fibrils are completely presented. A chapter is devoted to the endocytotic structures and cell processes. Another section focuses on the classification and nomenclature of fibrous components. The book can provide useful information to cytologists, scientists, students, and researchers.