Whoever first observed cell 20, who was the first to discover the cell

The cell was first discovered by the British scientist Hooke, but what Hooke observed was not a real biological cell, but a cell wall left behind after the cell died; On the basis of summarizing a large number of previous studies, German scientists Schwann and Schleiden put forward the cell theory by induction, the main content of which is that animals and plants are composed of the same basic unit cell.

Structure and function of cells:

1. Microstructure: the cell structure that can be observed in an ordinary light microscope.

2. Submicrostructure: Observe various microstructures in cells that cannot be clearly distinguished under an ordinary light microscope.

3. Prokaryotic cells: cells are small and do not have a formed nucleus. The substances that make up the nucleus are concentrated in the nuclear region, there is no staining with the reed body, the DNA does not bind to proteins, there is no nuclear membrane, no nucleolus; Organelles have only ribosomes; There is a cell wall with a different composition than eukaryotic cells.

4. Eukaryotic cells: cells are larger, have a true nucleus, have a certain number of chromosomes, have a nuclear membrane, have nucleolus, and generally have a variety of organelles.

5. Prokaryotes: organisms composed of prokaryotic cells. Such as: cyanobacteria, green algae, bacteria (such as nitrifying bacteria, lactic acid bacteria, Escherichia coli, pneumococcus), actinomycetes, mycoplasma, etc. are all prokaryotes.

6. Eukaryotes: Organisms composed of eukaryotic cells. Such as: yeast, mold, edible fungus, chlamydomonas, amoeba, paramecium, malaria parasite, etc.

7. Selective permeability of the cell membrane: This membrane allows water molecules to pass freely, and the ions and small molecules (such as amino acids, glucose) that the cell wants to absorb can also pass through, while other ions, small molecules and large molecules (such as:

messenger RNA, proteins, nucleic acids, sucrose) cannot be passed.

8. Membrane protein: refers to the protein components in various membrane structures in the cell.

9. Carrier protein: a transmembrane protein in the membrane structure related to the transport of substances with substance, and the carrier protein in the cell membrane has specificity in assisting diffusion and active transport.

10. Cytoplasm: Protoplasm within the cell membrane and outside the nucleus is called cytoplasm. Cytoplasm mainly includes cytoplasmic matrix and organelles.

11. Cytoplasmic matrix: The liquid part of the cytoplasm is the matrix. It is the main place where cells carry out their metabolism.

12. Organelles: A general term for various subcellular structures with specific functions in the cytoplasm.

13. Cell wall: There is a cell wall on the outside of plant cells, and the main chemical components are cellulose and pectin, which are used to support and protect. Its nature is completely transparent.

The English scientist Robert Hooke (1635 1703) first discovered the cell in 1665.

In 1665, the English scientist Robert Hooke was beside an early compound microscope, intently using a sharp pencil sharpener to cut smooth slices from a small piece of clean cork. When he put it under the microscope to look at it, he seemed to see some small cavities, but they weren't very clear.

So he cut out the very thin piece more carefully, because it was white, and placed it on a black board, and then cast a deep plano-convex mirror on it, so that he could clearly see that the thin piece was all porous and porous, like a honeycomb. In this way, the English physicist Robert Hooke (1635-1703) discovered the cell for the first time in 1665, laying the foundation for the study of biology.

A thin slice of the cork is viewed with a homemade light microscope and magnified to reveal a small space one by one. It is named after the English cell, and the meaning of this English word itself has the usage of a small room one grid at a time, so it is not a new word.

Although he did not really see a unit of life (because there were no signs of life), later generations of scientists still believed that he was responsible for it, and generally regarded him as the first person to discover the cell.

In fact, it was the Dutch biologist Ravenhoek (Leeuwenhoek) who really first discovered living cells.

According to records, the cell was developed by the British scientist Luo Zi.

Discovered by Robert Hooke (1635-1703) in 1665. As early as 1665, the English physicist Hooke (1635-1703) had already discovered cells by observing cork chips under a microscope.

At that time, he used a homemade light microscope to observe the thin slices of the cork, and when he zoomed in, he found that the small space was named after the English word cell, and the meaning of this English word itself has the usage of small room by grid, so it is not a new word. The cells thus observed were long since they died, and only the remnants of the plant cell wall could be seen, although he did not really see a unit of life (because there were no signs of life), and later scientists still considered him to be the first person to discover the cell. In fact, it was the Dutch biologist Ravenhoek (Leeuwenhoek) who really first discovered living cells.

From 1838 to 1839, the German biologists Schleiden and Schwann contributed to the establishment of the cell theory, which believed that all plants and animals are composed of cells.

sorry i don't knowMy science book says it was discovered by Robert Hooke.

Hello, the English scholar Hooke discovered in 1665 when he used a homemade microscope to observe cork flakes, he described the structure of plant cells for the first time, and for the first time borrowed the Latin word celler (chamber) to refer to the structure he observed. Later, the Dutch scholar Leeuwenhoek used a well-designed microscope to observe the living cells and protists of many plants and animals for the first time, and described the structure of the red blood cell nucleus of fish in 1674.

Robert Hooke.

Robert Hooke (1635-1702) was an English physicist. He has made achievements in various fields such as astronomy, physics and optics, and is the discoverer of Hooke's law in physics. Hooke used a homemade microscope to observe creatures such as fleas, lice, and mold, and recorded the results of his observations and results in a book called Microspectroscopy, which was published in 1665.

The book also shows a picture of the cork he saw, with a number of honeycomb-shaped chambers, which he called "cells," which he thought at the time had a similar effect to animal blood vessels, in which fluid flowed to transport nutrients. In fact, all he observed at the time was the cell wall of the dead cells of the wood bolt. However, Hooke's depiction of Tanhui cells in the Micrograph is the first discovery and observation of early-tolerant biological cells in humans.