eukaryotic cells are characterized by a complex structure.Its main component is the plasma membrane, the cytoplasm, which contains the membrane organelles, inclusion membranes and organelles without core.
membrane organelles have one or two membranes.They are a constant elements cells are characterized by a kind of structure and the corresponding functions.
By dvomembrannym structure of the cell is the cell nucleus, mitochondria and plastids (chloroplasts, chrome - and leucoplasts).Nemembrannymi elements are the ribosomes and the cell center.
during the cell cycle elements of the cytoskeleton may vary.For example, during the process of cell division in ducts cytoplasmic fade, a new structure - division spindle.
Odnomembrannye organelles: focus on their characteristics.
These structures are the building blocks of eukaryotic cells, which are separated from the cytosol to the membrane one.Odnomembrannye cell organelles include the endoplasmic grid Golgi structure and derivatives of it - lysosomes.
endoplasmic reticulum - a closed system of tubules that permeate the entire cytosol.It separates the cell into separate parts and is responsible for the transport of substances.The endoplasmic reticulum is opened in 1945 with an electron microscope, which allowed very loose structure seen throughout the cytoplasm.
mesh is granular cytoplasmic and agranular.Smooth (agranular) endoplasmic reticulum responsible for the synthesis of lipids and polysaccharides and granular comprises on its surface ribosomes that produce proteins.This structure facilitates the transfer of different compounds across the cell, circulating nutrients.
is worth noting that the tank granular reticulum associated with the shell of the nucleus and participate in the formation of new membranes kernels, which are formed after cell division.
Golgi apparatus can be different forms, but in most cases takes the form of thickened disks that form dictyosomes.From dictyosomes depart tubes, which are concentrated at the end of bubbles.In the Golgi accumulated substances that are synthesized in the cell and are removed from it.This organelle is well developed in the glandular cells.
Its bubbles are involved in the formation of the cytoplasmic membrane, as well as individual organelles - lysosomes primary.
Lysosomes are membrane structures rounded, containing enzymes, by which the cell is able to break down various organic substances.These organelles odnomembrannye perform another function - to cleave some of the structural elements of the cell without affecting its operation, providing an additional source of supply with insufficient intake of nutrients.In addition, the lysosomes are responsible for the destruction of dead and unnecessary organelles.
It should be noted that all odnomembrannye organelles are important for the preservation of cellular homeostasis, as they provide the normal functioning of cells.
