The centrosome is a microtubule-organizing center found near the nuclei of animal cells. ... The centrosome (the organelle where all microtubules originate) replicates itself before a cell divides, and the centrioles appear to have some role in pulling the duplicated chromosomes to opposite ends of the dividing cell.Centrioles are found as single structures in cilia and flagella in animal cells and some lower plant cells. In animal cells centriolesorganise the pericentriolar material to produce microtubules including mitotic spindle fibres.Centrosomes are structures found inside of cells. They are made from two centrioles. Centrioles are microtubule rings. The main purpose of a centrosome is to organize microtubules and provide structure for the cell, as well as work to pull chromatids apart during cell division. Found only in animal cells, these paired organelles are typically located together near the nucleus in the centrosome, a granular mass that serves as an organizing center for microtubules.

Centrosomes are structures that are found only in animal cells and are not present in plant cells. They play a crucial role in cell division and the organization of the cytoskeleton.

Structure of Centrosomes:
- Centrosomes are composed of two centrioles, which are cylindrical structures made up of microtubules. The centrioles are arranged perpendicular to each other and are surrounded by a protein-rich matrix called the pericentriolar material.

Function of Centrosomes:
- Centrosomes are involved in the process of cell division. During cell division, the centrosomes duplicate and the two centrioles separate, forming two pairs of centrioles. These centriole pairs then migrate to opposite ends of the cell, where they form the poles of the mitotic spindle.
- The mitotic spindle is a structure that helps in the separation of chromosomes during cell division. It is composed of microtubules that extend from the centrosomes and attach to the chromosomes, allowing them to be pulled apart.
- Centrosomes also play a role in the organization of the cytoskeleton. Microtubules extend from the centrosomes throughout the cell, providing structural support and facilitating intracellular transport.

Comparison with Plant Cells:
- Plant cells do not have centrosomes. Instead, they have structures called spindle pole bodies (SPBs) that perform similar functions during cell division. SPBs are located within the nuclear envelope and are involved in the formation of the mitotic spindle.
- Additionally, plant cells have a cell wall that provides structural support, so they do not rely as heavily on the cytoskeleton for support as animal cells do.

Conclusion:
In summary, centrosomes are structures that are unique to animal cells and are important for cell division and the organization of the cytoskeleton. They contain centrioles and play a crucial role in the formation of the mitotic spindle. Plant cells, on the other hand, do not have centrosomes but have spindle pole bodies that perform similar functions.