GENERAL HISTOLOGY

Detailed explanation-1: -The optical microscope is a useful tool for observing cell culture and confirming that they are proceeding properly. An operator visually observes cultured cells using an optical microscope in order to evaluate their condition and determine whether to proceed to the next step in the culture process.

Detailed explanation-2: -A microscope is an instrument that can be used to observe small objects, even cells. The image of an object is magnified through at least one lens in the microscope. This lens bends light toward the eye and makes an object appear larger than it actually is.

Detailed explanation-3: -Two types of electron microscopy-transmission and scanning-are widely used to study cells. In principle, transmission electron microscopy is similar to the observation of stained cells with the bright-field light microscope.

Detailed explanation-4: -As living cells are translucent, they must be stained to be visible in a traditional light microscope. Unfortunately, the process of staining cells generally kills them. With the invention of the phase-contrast microscopy it became possible to observe unstained living cells in detail.

Detailed explanation-5: -A cell is the smallest unit of life. Most cells are so tiny that they cannot be seen with the naked eye. Therefore, scientists use microscopes to study cells. Electron microscopes provide higher magnification, higher resolution, and more detail than light microscopes.