 <translate> Myelin is a lipid-rich (fatty) substance formed in the central nervous system (CNS) by glial cells called oligodendrocytes, and in the peripheral nervous system (PNS) by Schwann cells. Myelin insulates nerve cell axons to increase the speed at which information (encoded as an electrical signal) travels from one nerve cell body to another (as in the CNS) or, for example, from a nerve cell body to a muscle (as in the PNS). The myelinated axon can be likened to an electrical wire (the axon) with insulating material (myelin) around it. However, unlike the plastic covering on an electrical wire, myelin does not form a single long sheath over the entire length of the axon. Rather, each myelin sheath insulates the axon over a single section and, in general, each axon comprises multiple long myelinated sections separated from each other by short gaps. Each myelin sheath is formed by the concentric wrapping of an oligodendrocyte or Schwann cell process around the axon.

Answer this question: the myelin sheath that covers many cns axons is formed by? Let's give stream of consciousness first: <yor> Myelin jẹ ohun elo ti o ni ọlọrọ lipid (ọra) ti a ṣẹda ni eto aifọkanbalẹ aringbungbun (CNS) nipasẹ awọn sẹẹli glial ti a pe ni oligodendrocytes, ati ni eto aifọkanbalẹ agbegbe (PNS) nipasẹ awọn sẹẹli Schwann. Myelin máa ń dáàbò bo àwọn sẹ́ẹ̀lì iṣan ara láti lè mú kí ìsọfúnni (tí wọ́n fi ṣe àmì oníná) máa yára kọjá láti inú sẹ́ẹ̀lì iṣan ara kan lọ sí òmíràn (bí èyí tó wà nínú CNS) tàbí, bí àpẹẹrẹ, láti inú sẹ́ẹ̀lì iṣan ara kan lọ sí iṣan ara (bí èyí tó wà nínú PNS). A lè fi ohun tó ń jẹ́ myelin tó wà lára ẹ̀yà ara tó ń mú kí iṣan ara ṣiṣẹ́ wé ẹ̀rọ tó ń mú kí iná mànàmáná ṣiṣẹ́ (ìyẹn axon) tó ní ohun kan tó ń jẹ́ myelin tó ń dáàbò bò ó. Àmọ́, yàtọ̀ sí àwọn ohun èlò tó máa ń bo okùn iná mànàmáná mọ́ra, myelin kì í ṣe ohun èlò kan ṣoṣo tó máa ń mú kí okùn náà gùn gan-an. Kàkà bẹ́ẹ̀, àpò miyelini kọ̀ọ̀kan máa ń dábùú ẹ̀yà ara kan ṣoṣo, ó sì sábà máa ń jẹ́ pé ẹ̀yà ara kan ṣoṣo ni ẹ̀yà ara miyelini gígùn tó pín sí, tí àwọn àlàfo tó kéré máa ń mú kí wọ́n jìnnà síra wọn. Iboju myelin kọọkan ni a ṣe nipasẹ ifọwọyi ti oligodendrocyte tabi ilana sẹẹli Schwann ni ayika axon.  Dáhùn ìbéèrè yìí: kí ló máa ń ṣe myelin sheath tó ń bo ọ̀pọ̀lọpọ̀ àwọn axon CNS? Ẹ jẹ́ ká kọ́kọ́ sọ̀rọ̀ nípa ìmọ̀lára: 