Cytokinesis

Cilliate undergoing cytokinesis, with the cleavage furrow being clearly visible.
Animal cell telophase and cytokinesis

Cytokinesis (s/) is the part of the cell division process during which the cytoplasm of a single eukaryotic cell divides into two daughter cells. Cytoplasmic division begins during or after the late stages of nuclear division in mitosis and meiosis. During cytokinesis the spindle apparatus partitions and transports duplicated chromatids into the cytoplasm of the separating daughter cells. It thereby ensures that chromosome number and complement are maintained from one generation to the next and that, except in special cases, the daughter cells will be functional copies of the parent cell. After the completion of the telophase and cytokinesis, each daughter cell enters the interphase of the cell cycle.

Particular functions demand various deviations from the process of symmetrical cytokinesis; for example in oogenesis in animals the ovum takes almost all the cytoplasm and organelles. This leaves very little for the resulting polar bodies, which in most species die without function, though they do take on various special functions in other species.[1]Another form of mitosis occurs in tissues such as liver and skeletal muscle; it omits cytokinesis, thereby yielding multinucleate cells.

Plant cytokinesis differs from animal cytokinesis, partly because of the rigidity of plant cell walls. Instead of plant cells forming a cleavage furrow such as develops between animal daughter cells, a dividing structure known as the cell plate forms in the cytoplasm and grows into a new, doubled cell wall between plant daughter cells. It divides the cell into two daughter cells.

Cytokinesis largely resembles the prokaryotic process of binary fission, but because of differences between prokaryotic and eukaryotic cell structures and functions, the mechanisms differ. For instance, a bacterial cell has only a single chromosome in the form of a closed loop, in contrast to the linear, usually multiple, chromosomes of eukaryotes; accordingly bacteria construct no mitotic spindle in cell division. Also, duplication of prokaryotic DNA takes place during the actual separation of chromosomes; in mitosis, duplication takes place during the interphase before mitosis begins, though the daughter chromatids do not separate completely before the anaphase.

Etymology and pronunciation

The word "cytokinesis" (ə-/[2][3]) uses combining forms of cyto- + kine- + -sis, New Latin from Classical Latin and Ancient Greek, reflecting "cell" and kinesis ("motion, movement"). It was coined by Charles Otis Whitman in 1887.[4]

Origin of this term is from Greek κύτος (kytos, a holow), Latin derivative cyto (cellular), Greek κίνησις (kínesis, movement).

Other Languages
български: Цитокинеза
català: Citoquinesi
čeština: Cytokineze
español: Citocinesis
français: Cytodiérèse
galego: Citocinese
hrvatski: Citokineza
Bahasa Indonesia: Sitokinesis
italiano: Citocinesi
עברית: ציטוקינזה
қазақша: Цитокинез
Kreyòl ayisyen: Sitokin
lietuvių: Citokinezė
Nederlands: Cytokinese
日本語: 細胞質分裂
norsk: Cytokinese
polski: Cytokineza
português: Citocinese
română: Citochineză
русский: Цитокинез
Simple English: Cytokinesis
srpskohrvatski / српскохрватски: Citokineza
svenska: Cytokines
Türkçe: Sitokinez
українська: Цитокінез