Are the ducts of plants living or dead cells?

The ducts are dead cells, and the sieve tubes are living cells!

Conduction tissue Conduction tissue is a tissue in the plant body that is responsible for the long-distance transportation of materials, which is formed by connecting tubular cells up and down, and runs through various organs of the plant body. Conductive tissues are divided into two categories according to their structure and function.

Ducts and tracheids: The main function of ducts and tracheids is to transport water and inorganic salts. The protoplasts and transverse walls of ductal cells are gone, and the longitudinal walls are thickened and lignified, and they are dead cells.

The uneven thickening of the cell wall of the catheter forms different patterns, according to which the catheter can be classified into various types. Tracheids are long, narrow cells with oblique tips at both ends, which are also dead cells, and the tracheids are not as transductive as the ducts, and there are many types.

Sieve tubes and companion cells: The main function of sieve tubes is to transport organic matter. The cell walls that make up the sieve tubes are thinner and contain protoplasts, and the nucleus disappears and are living cells.

There are many small pores in the transverse wall between the upper and lower cells, called sieve pores. The cell wall with sieve pores is called a cribriform plate. The protoplasm of sieve tube cells is connected by sieve pores and becomes a channel for the transport of organic matter.

A companion cell is a smaller, narrow, living cell located next to the sieve tube that communicates with the adjacent sidewall of the sieve tube with plasmodes, which facilitates the transport of the sieve tube.

The duct is a tubular structure that mainly transports water and inorganic salts in the plant body. It is composed of a string of highly differentiated tubular dead cells.

By the way, the sieve tube is the tubular structure of the main organic matter of the plant body (that is, the transportation channel of nutrients).

The duct is dead and the sieve tube is alive.

The duct is dead, the cell is the transport structure of water in the stem, it belongs to the shaping tissue, each duct is composed of many long tubular cells, these cells have no cytoplasm and the cell wall between the upper and lower cells of the nucleus has disappeared, forming a hollow pipe, in addition to static, there are also ducts in the roots and leaf veins, these ducts are connected to each other to form the water duct is dead, the cell is the transport structure of water in the stem, it belongs to the shaping tissue, Each duct is composed of many long tubular cells, these cells have no cytoplasm and the cell wall between the upper and lower cells of the nucleus has disappeared, forming a hollow pipe, in addition to static, there are also ducts in the roots and leaf veins, these ducts are connected to each other, forming a pipe network for water transport, the water absorbed by the roots is sent to all parts of the plant body through this website, and the inorganic salts dissolved in the water are also transported to the various parts of the plant body through this pipe network.

The ducts and wood fibers of plants belong to dead cells.

The duct is made up of a type of cell that has died, only a cell wall, and the upper and lower cells are through, located in the xylem of the vascular bundle, and it transports the water and inorganic salts absorbed from the roots to all parts of the plant's body. The sieve tube is a pipe that conducts organic nutrients in the phloem of the plant, which is composed of many tubular living cells connected up and down.

Wood fiber refers to the mechanical organization composed of lignified thickened cell wall and fibroblasts with fine crack-like pores, and is one of the main components of xylem. Wood fibers are mixed in the middle of the tracheids, but there are also intermediate cells that are morphologically in tracheids and wood fibers, called fibrous tracheids. Wood fibers and bast fibers are produced from the original cambium or cambium layer, so wood fibers are also dead cells.

The ducts and fibers of plants are dead cells. The need for the plant body to grow on its own, such as the duct molecules are thick-walled elongated cells that do not have living protoplasts when they mature.

The tubular structure in the xylem of ductal plants mainly transports water and inorganic salts. It is composed of a string of highly specialized tubular dead cells with perforated end walls connected to each other, each of which is called a ductal molecule or ductal node. The duct molecule is a living cell in the early stages of development, and after maturation, the protoplasts disintegrate and the cells die.

During the maturation of duct molecules, the cell wall is lignified and has different forms of secondary thickening such as ring, thread, ladder, reticulation, and pore pattern. In the end wall between two adjacent catheter molecules, the hole sock dissolves to form a perforated plate. In the plants of the cocoon, except for a few families (such as Quinlan and Aqua spp.), there are ducts; The ducts are also found in the order Mawria in certain ferns (e.g., juniper, European fern) and gymnosperms.

The duct is made up of a type of cell that has died, with only a cell wall, and the upper and lower cells are through. It is located in the xylem of the vascular bundle, and its function is simple, it is to transport the water and inorganic salts absorbed from the roots to the rest of the plant's body, without the need for energy.

Both ducts and sieve tubes belong to the conductive tissues of plants.

The more evolved tree species are generally perforated ducts and reticulated ducts; The more primitive tree species are generally annular and threaded conduits; If the length of the duct molecule is long, the diameter of the duct is small, and if the length of the duct molecule is short, the diameter of the duct is large; The length of the fiber molecule is generally larger than the length of the duct molecule, and the diameter of the fiber molecule is generally smaller than the diameter of the duct molecule.

Sieve tubes are living cells.

Sieve tube, a cell biology term, refers to a tubular structure in the phloem of higher plants. It is composed of sieve molecules that are responsible for the long-distance transport of photosynthetic products and a variety of organic matter in the plant body.

A sieve tube consists of a series of tubular viable cells with frit plates with an end wall, each cell being a sieve tube molecule. There are concave areas on the side and end walls of the sieve tube molecules—sieve domains—sieve domains, and sieve pores on the sieve domains. The sieve area on the end wall has a high degree of specialization and a large sieve hole, which is called a sieve plate.

To put it simply, because the cell lignin content is high, the cell wall is thickened and lignified, the cell cavity is small, and there are no living protoplasts after maturity, becoming dead cells with only a cell wall.

Not all of the xylem in the root system are dead cells, all of which form empty ducts, which are used to transport the water and mineral elements absorbed by the roots upward;

Wood fibers are elongated, tapering thick-walled tissue cells with tapering ends at both ends, generally with lignified secondary walls, often thicker than the tracheid wall. It mainly plays a supporting role in the plant body. Wood fibers can be divided into two types: fibrous tracheids and tough fibers.

The former are fibrous tracheids, generally with thickened secondary walls and bordered pores with biconvex mirrors or slit-like openings. The latter is longer and thicker than the former, with single perforations in the walls. Both fibers can be separated.

Separator wood fibers are widely found in dicots, and in mature sapwood, protoplasts remain to store nutrients.

Pure natural wood fiber products are made of 2 to 3-year-old natural and pollution-free Australian fast-growing trees, crushed and cooked into wood pulp at high temperature to extract fiber. Through special technology and production process, the sugar and lipid in the wood are removed, and the electrostatic reaction of advanced technology ** substances is adopted.

There are no chemical ingredients in the whole process, and it is 100% green like cotton. It has the functions of natural antibacterial health care, odor removal, self-cleaning and self-cleaning, soft to the touch, not hardened, and is a real, pure green health product.

Living cells consume energy, and organisms have basically met the requirements of energy conservation in the evolution process of nature. The stem of the plant only needs to function as a duct and support, and the dead cells are more "energy-efficient" than the living cells, and the fibers left by the dead cells are harder than the original living cells.

Just like hair and nails are dead cells, you can understand the first nucleus!

Living cells will consume nutrients, and ductal cells only play a role similar to the wall of a straw, the evolution of organisms is cruel, and resources must be used rationally everywhere, or they will be eliminated if they are not defeated, and the species will become extinct, which is the main reason. Dead cells are not able to attack the metabolism that can be bent in the shoot.