What should a biological specimen observe under a microscope?

Biological specimens under microscope should have appropriate thickness and transparency, keep in a natural state, and be prepared and preserved.

1. Appropriate thickness and transparency: In order to observe the clear cell and tissue structure, the specimen needs to be thin and transparent enough. Generally speaking, the slice thickness should be controlled between several microns and tens of microns, while the smear should be thinner. If the specimen is too thick or opaque, it will affect the penetration of light and the observation effect of microscope.

2. Keep the specimen in a natural state: try to keep the specimen in a natural state and don't over-treat or modify it. Excessive fixation or staining may change the original structure and function of cells or tissues and affect the accuracy of observation results. If dyeing is necessary, appropriate dyeing methods should be selected and the degree of dyeing should be controlled to clearly show the structure and function of cells and tissues.

3. Preparation and preservation: In order to obtain high-quality observation results, preparation and preservation of specimens are also very important. In the preparation process, the integrity and parallelism of the slices should be ensured, and appropriate preservation measures should be taken, such as using appropriate fixatives and preservation solutions to prevent the specimens from being deformed or damaged.

The role of biological specimens:

1. Auxiliary teaching: Biological specimens are an important tool for biology teaching. By observing the specimens, students can better understand the morphological, structural, ecological and developmental characteristics of various organisms and improve their understanding and memory of biological knowledge. At the same time, biological specimens can also help students to cultivate the ability to observe, analyze and solve problems and improve their scientific literacy.

2. Scientific research: Biological specimens are important materials for biological science research. By comparing and analyzing biological specimens of different types, different growth stages and different ecological environments, scientists can study the laws of biological evolution, classification, ecology and physiology, and provide strong support for protecting biodiversity, discovering new species and biomedical research.

3. Cultural inheritance: Biological specimens are also an important carrier of human cultural inheritance. By collecting, sorting and preserving biological specimens, scientists and artists can create works of cultural value, such as biological art, biological photography and biological sculpture. In addition, some rare or extinct biological specimens also have high historical and cultural value, which is of great significance for people to understand nature, protect the environment and promote the construction of ecological civilization.