GENERAL HISTOLOGY

Detailed explanation-1: -Mechanical stage – flat surface on which the slide is held in place by the specimen holder. The stage can be moved up or down by the Coarse adjustment knob or Fine adjustment knob which are on the microscope arm to focus on different levels of the specimen observed.

Detailed explanation-2: -COARSE ADJUSTMENT KNOB-A rapid control which allows for quick focusing by moving the objective lens or stage up and down. It is used for initial focusing.

Detailed explanation-3: -This is the knob on the side of the microscope that moves the objective lens up and down. It is used in conjunction with the fine focus. A focusing system with both the coarse and fine focusing knobs mounted on the same axis. The coarse focus is typically the larger, outside knob and vice versa.

Detailed explanation-4: -The upper part of the arm of the microscope comprises a hollow and tubular structure known as the body tube. The body tube can be shifted down and up using the adjustment knobs. It is the smaller knob, which is used for sharp and fine focusing of the object. For accurate and sharp focusing, this knob can be used.

Detailed explanation-5: -Revolving Nosepiece or Turret: This is the part that holds two or more objective lenses and can be rotated to easily change power. Objective Lenses: Usually you will find 3 or 4 objective lenses on a microscope.