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Centrioles and Centrosomes

Centrioles and Centrosomes

Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or "prometaphase,"...

Centrosome Duplication

Centrosome Duplication

The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...

Centrosome Duplication

Centrosome Duplication

The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...

Determining the Plane of Cell Division

Determining the Plane of Cell Division

Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...

Determining the Plane of Cell Division

Determining the Plane of Cell Division

Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...

Distribution of Cytoplasmic Content

Distribution of Cytoplasmic Content

Cytokinesis segregates a cell’s chromosomes and organelles into its daughter cells. Organelles divide and grow prior to cell division but cannot be synthesized de novo; therefore, cells must receive at least one copy of each organelle to survive. Currently, many of the details of how the organelles are distributed are not yet fully elucidated.
Distribution of cytoplasmic determinants
The cytoplasm contains various organelles, as well as salts, proteins, and water. The distribution of small...

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Related Experiment Video

Updated: Jun 23, 2026

Live-Cell Imaging of Drosophila melanogaster Third Instar Larval Brains

Live-Cell Imaging of Drosophila melanogaster Third Instar Larval Brains

Published on: June 23, 2023

The centrosome and asymmetric cell division.

Yukiko M Yamashita¹

¹Life Sciences Institute, Center for Stem Cell Biology, Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109-2216, USA. yukikomy@umich.edu

|May 22, 2009

Summary

Asymmetric cell division, crucial for tissue homeostasis, involves organizing cellular components. This review highlights recent discoveries in cellular polarity and centrosome function driving asymmetric outcomes.

Area of Science:

Cell Biology
Developmental Biology
Molecular Biology

Background:

Asymmetric cell division is vital for tissue homeostasis, producing one stem cell and one differentiating cell.
This process is observed across diverse organisms, from unicellular life to complex tissues.
Cellular organization along an axis of asymmetry is critical for asymmetric outcomes.

Purpose of the Study:

To review recent advancements in understanding cellular polarity.
To focus on the role of the centrosome in establishing cell asymmetry.
To explore how these mechanisms contribute to asymmetric cell division.

Main Methods:

Literature review of recent studies on cellular polarity and asymmetry.
Focus on experimental findings related to centrosome function.

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Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets

Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets

Published on: August 13, 2016

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Last Updated: Jun 23, 2026

Live-Cell Imaging of Drosophila melanogaster Third Instar Larval Brains

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Published on: June 23, 2023

Live Cell Imaging to Assess the Dynamics of Metaphase Timing and Cell Fate Following Mitotic Spindle Perturbations

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Published on: September 20, 2019

Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets

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Published on: August 13, 2016

Synthesis of information on intracellular component organization.

Main Results:

Cellular asymmetry involves organizing intracellular components along a defined axis.
The centrosome frequently acts as a central organizing point for the cytoskeleton in asymmetric division.
Recent discoveries reveal diverse mechanisms driving cellular polarity.

Conclusions:

Centrosome function is a key determinant in achieving asymmetric cell division outcomes.
Understanding cellular polarity and centrosome roles is essential for comprehending tissue development and homeostasis.
Further research into these mechanisms can elucidate developmental processes and disease pathologies.