What strange biological structures have you seen under a microscope?

I have a microscope, the multiplier is quite high, the oil mirror has 2500 times, I have seen a lot of things, but in fact it is difficult to observe the specific cell structure, the biology books are all slice colored specimens, it is easy to observe, but this individual is not easy to make, the easiest to see under the lens is a variety of microorganisms and small insects invisible to the naked eye, the cell body structure can not be observed, because there is no staining, although the cells are mostly transparent, but the slices are not thin enough, the light penetration effect will still attenuate, The light in the lens is not enough, and the details of observation are much worse, so the cells seen are mostly blurry, and the easiest to see is the neatly arranged cells, a bit like the feeling of seeing a sea of people from the sky, and some cells are very small and cannot be seen clearly at all, this kind of thing still requires professional laboratory operation.

Those who have a nucleus are eukaryotes: including animals, plants, and fungi (yeast, penicillium, bread mold, etc.), and cells can be divided into eukaryotic cells and prokaryotic cells according to whether there is a nucleus in the cell. Yeast is usually ovoid in shape and has a cell wall, cell membrane, cytoplasm, nucleus, vacuole, so it is eukaryotic which is different from the prokaryotes of bacteria.

I observed the ** of bacteria under the microscope, and observed the morphological and structural characteristics of bacteria, there are 3 kinds of morphological structures of bacteria, namely spirochetes, cocci and bacilli. Bacterial cells have neither chloroplasts nor nuclei and can only live on existing organic matter.

If you look closely at the surface of spoiled pork and moldy bread cubes in a petri dish with a magnifying glass, can you count the number of bacteria inside, bacteria are single-celled organisms, the individual is very small, and you can't see a single bacteria with a magnifying glass, but we can see that a large number of bacteria multiply together to form bacteria-colonies. To observe the true face of bacteria, it is possible to observe them with a high-magnification lens of an optical microscope.

The structure is divided into two layers: the outer layer is the epidermal layer, the inner layer is the dermis layer, and there is the subcutaneous tissue. **Composed of protective tissue, nervous tissue, connective tissue, and muscle tissue.

**The function is to protect, secrete, excrete and regulate body temperature. The four major tissues that make up the first class are combined in an orderly manner in a certain order and perform certain functions, and such a structure is called an organ.

Drop a drop of water on the ** of the glass slide, add a drop of the containing culture medium, cover the coverslip, and make a mount. Put the mount under a microscope and look at it, find a paramecium, look at the structure, does it have chloroplasts in it? Based on your understanding of animal ingestion and digestion, imagine which structures of paramecium might be involved in food ingestion and digestion?

Bacteria are microorganisms that do not have a nucleus and are prokaryotes. Organisms that have a nuclear structure as opposed to prokaryotes, we call eukaryotes. Why does bread get moldy? It is because of the proliferation of molds, which have a nucleus, and bacteria do not have a nucleus.

The inner surface of the internal organs and the inner surface of various lumens in the body have tight cell arrangement and little interstitial cells, which protect, secrete and absorb. The inner surface of the internal organs and the inner surface of various lumens in the body have various cell morphologies, more interstitial cells, and large intercellular spaces, transporting, supporting, protecting, and connecting.

It was Hooke, the scientist who first discovered the cellular structure of living things under a microscope, and the first microscope was named after him.

Robert Hooke, this is a British scientist, it was he who discovered the structure of biological cells, discovered the structure of biological cells of onions.

This biologist was Hooke, who was one of the first to discover the cellular structure of living things under a microscope, but he didn't know it at the time.

Robert Hooker , who discovered the cellular structure of onions through a microscope, was a great discovery.

The following are two different types of biological microscope structures and their names.

1.Cells: including cells obtained by isolating blind cells from various animal and plant tissues and organs (can also be observed in vivo, such as observing onion epidermal cells, making slice specimens, etc.); plant and animal cells cultured in vitro (e.g., cancer cells);

2.Microbial Sails: This includes all kinds of bacteria, fungi, viruses, and more.

3.Unicellular animals: i.e. single-celled animals in the phylum Protozoa, like paramecium, etc.

4.Single-celled plants: This mainly refers to single-celled algae, such as chlorella and so on. It's basically phytoplankton (and benthic).

5.Other microscopic animals: Some animals in the phylum are very small and hail, such as rotifers, which also need to be observed under a microscope. The larvae of some large animals are also very small and need to be observed under a microscope, such as the larvae of sea cucumbers. These are basically zooplankton.

In addition, microscopy technology has advanced rapidly, and more subtle structures within cells can be observed using more advanced microscopic techniques such as electron microscopy.

The microscope structure from top to bottom has:

Eyepieces, Tubes, Arms, Coarse Collimation Spirals, Fine Collimation Spirals, Objective Converters, Objective Lenses, Tablet Clamps, Stages, Clear Apertures, Light Shields, Reflectors, Mirror Columns, Lens Holders.

Pure hand hitting, please support. First of all, microscopes are divided into two types: optical microscopes and electron microscopes, in which the optical microscope uses the principle of optical imaging to output an image (inverted image, that is, any pixel on the two-dimensional plane is symmetrical to the focal point). The imaging principle of electron microscopy is to use a so-called "magnetic lens", i.e. an electric field similar in principle to a light microscope.

The charged example is subject to the Lorentz force in the field and will undergo motion offset, refer to the transfer of light rays in the lens.

Electron microscopy imaging relies on computer systems because the human eye cannot receive particles passing through the specimen on the stage, and these particles eventually rely on the photoelectric effect to be converted into electrical signals that can be processed by computer systems and presented in front of people's eyes. Therefore, what is seen in the electron microscope is a processed indirect image (which is also an inverted image).

Optical microscopes are our most common microscopes, so almost all of the images presented by light microscopes are real images that go directly to the naked eye. Transparent specimens, such as living cells, because most of the cells themselves are non-pigmented, showing a nearly transparent state, but the refractive index of each part of the structure is not the same, then there will be a clear image at the interface with a large difference in refractive index (such as cell membrane, organelle membrane, etc.). In other words, many structures are difficult to observe in unstained specimens.

Phase contrast microscopy is the principle of using the phase difference of light passing through a medium with different refractive indices (light is an electromagnetic wave, and the wave speed difference is small and the wave frequency difference is large in different media), and the phase difference is converted into the amplitude difference of the light wave by interference (the amplitude of light is expressed as brightness), so different structures in the field of view show different brightness, which is easy to distinguish.

There is also a kind of dark-field microscope, which uses the diffraction effect of light around obstacles, only the diffracted light enters the human eye, then the entire field of vision is dark and lightless, only through the diffraction light around the specimen, the object is presented as a bright spot-like image, which is generally used to observe living cells that cannot be stained.

Stop, look at the picture, my home optics 1200 times.

Cell membrane (the cell wall of a plant cell can only be seen when the plasma wall is separated, and the cell membrane and cell wall of normal cells are together), cytoplasm: organelles that can be seen: mitochondria (blue-green dots can only be seen by staining with genagreen), chloroplasts, vacuoles, and the complete structure of the nucleus (the nuclear membrane, nuclear pores, etc. are indistinguishable).

The resolution of electron microscopy is nanometers, and the structures that can be observed include cell membranes, ribosomes, cytoskeletons, etc.

The cell structures that can be observed with light microscopy include the cell wall, plasmodesmata filament, cytoplasm, nucleus, and chloroplast. Chromosomes, mitochondria, endoplasmic reticulum, Golgi apparatus, etc., can also be seen after staining, but ribosomes are not visible. Under the electron microscope, ribosomes, nuclear pores of the nucleus, cell membranes, etc. can be seen.

The centrosomes of animal cells can only be seen under the electron microscope.

What plant cell structure can be seen in a high-powered microscope.

Light microscopy can see the cell wall, cytoplasm, nucleus, mitochondria, chloroplasts, large vacuoles.

Electron microscopy can see cell membranes, endoplasmic reticulum, Golgi apparatus, ribosomes, lysosomes, chromosomes (plasma), as well as the internal structures of organelles, such as the crest of mitochondria, the basal granules of chloroplasts, etc.

The cytoplasm, nucleus, cell wall (plant cells) vacuoles (plant cells) can be seen with an optical microscope, and the electron microscope can see things that cannot be seen with a light microscope, such as ribosomes, Golgi apparatus, mitochondria, endoplasmic reticulum, cell membranes, chloroplasts (plant cells).

The resolution of the optical microscope is greater than.

Electron microscopy is less than.

Cell membrane (the cell wall of a plant cell can only be seen when the plasma wall is separated, and the cell membrane and cell wall of normal cells are together), cytoplasm: organelles that can be seen: mitochondria (blue-green dots can only be seen by staining with genagreen), chloroplasts, vacuoles, and the complete structure of the nucleus (the nuclear membrane, nuclear pores, etc. are indistinguishable).

It's good to buy a play with nothing Light microscope 1600 times ** is only more than 300 yuan Look at plant epidermal cells, red blood cells and white blood cells in the blood, lactic acid bacteria in sour milk, bacteria on the hands, and so on.