Cytokinesis:Animal vs. Plant Cells

Cytokinesis is the division of the cytoplasm during cell division, following nuclear division (mitosis or meiosis). While the process is similar in animal and plant cells, there are significant differences due to the presence of a rigid cell wall in plants.

Dierlijke cellen:

* Cleavage furrow: Cytokinesis begins with the formation of a cleavage furrow , an indentation on the cell surface.

* Contractile ring: The furrow is formed by a ring of actin filaments and myosin called the contractile ring , which contracts like a purse string.

* Cell membrane invagination: As the contractile ring tightens, the cell membrane invaginates and eventually pinches off, creating two daughter cells.

Plantencellen:

* Cell plate formation: Instead of a furrow, plant cells form a cell plate , a new cell wall that separates the two daughter cells.

* Golgi apparatus role: The cell plate originates from vesicles derived from the Golgi apparatus which fuse at the center of the parent cell.

* Cell wall material deposition: The vesicles contain cell wall material, such as cellulose and pectin, which are deposited at the cell plate.

* Fusion with existing walls: As the cell plate expands, it eventually fuses with the existing cell walls of the parent cell, separating the two daughter cells.

Hier is een tabel die de belangrijkste verschillen samenvat:

| Feature | Animal Cells | Plant Cells |

| --- | --- | --- |

| Initiation | Splitsing voor de vorming van splitsing | Cell plate formation |

| Mechanism | Contractile ring (actin and myosin) | Vesicles from Golgi apparatus |

| Material deposited | Cell membrane | Cell wall material (cellulose, pectin) |

| Final outcome | Invagination and pinching off | Fusion with existing cell walls |

Samenvattend:

* Animal cells use a contractile ring to pinch off the cell membrane, dividing the cytoplasm.

* Plant cells form a cell plate, a new cell wall, derived from Golgi vesicles, to separate the daughter cells.

Both processes ultimately achieve the same goal:dividing the cytoplasm and creating two independent daughter cells.