What Is the Centrosome?

Centrosome is an important organelle in animal cells. Each centrosome contains two centrioles. It is the center of internal activity during cell division. There are centrosomes in animal cells and some lower plant cells. It is always located in the cytoplasm near the nucleus, close to the center of the cell, so it is called centrosome. It can be seen under an electron microscope that each centrosome contains two centrioles, which are aligned perpendicular to each other. Centrosomes are involved in mitosis of cells.

Centrosome is an important membraneless structure in animal or lower plant cells.

The basic structure and function of the centrosome

Centrosomes are organelles of animal cells and lower plant cells. Usually it does not exist

Generally distributed in animal cells and lower plant cells, located in the cytoplasm near the nucleus, close to the center of the cell ^[2]

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In the interphase of cell division, the paired centrioles self-replicate into two pairs, and then move towards the two poles of the cell.

Centrosome is the main microtubule tissue center located on the nucleus side. It consists of a pair of centri-oles arranged perpendicular to each other and a surrounding group of transparent electron-dense amorphous centrioles. Microtubules are not assembled directly from centrioles, but more directly have the role of microtubule tissue center is the substance around the centrosome. Microtubules grow out of this part of the substance. The central particle is a cylindrical body with a diameter of 0.2 micrometers and a length of 0.4 micrometers. The cylinder wall is surrounded by nine groups of triplet microtubes arranged at an angle of 45 degrees in the radial direction. In animal cells, the centriole completes its own development cycle with the cell cycle. In the late G1 period, the two centrioles are slightly separated, and in the S phase, a daughter centriole grows next to each mother centrosome. Centrioles are continuously prolonged. In the G2 phase, each centrosome contains two pairs of centrioles. In the early stage of mitosis, the centrosome is divided into two parts, each forming two centrosomes, and microtubules are emitted from its surroundings to form a stellate. The body constantly moves towards the poles, forming the poles of the spindle. After mitosis, each centrosome of each daughter cell obtains a pair of centrioles.