Course - 222 Descriptive Histology Introduction.

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Presentation transcript:

Course Descriptive Histology Introduction

HISTOLOGY It is the microscopic study of normal human cells and tissues. Types of Microscopes: 1-Light microscopes (LM) (colored)-student microscope, use the day light or electric light as a source of illuminations. 2-Electron Microscopes (EM)  Hematoxyline and Eosin (H&E) is a routine stain. 1.Hematoxyline is an basic stain so it stains the acidic components of the cell, as DNA & RNA (nucleus ) gives dark blue. 2.Eosin is an acidic stain so it stains the basic components of the cell (cytoplasm) gives pink.

A light microscope showing its main components

Cross (transverse) section (T.S) longitudinal section (L.S)