▁around ▁smaller ▁ax ons ▁( External ▁image ▁here ) ▁and ▁form ▁Rem ak ▁bund les . ▁ ▁My elin ating ▁Schw ann ▁cells ▁begin ▁to ▁form ▁the ▁my elin ▁she ath ▁in ▁m amm als ▁during ▁f etal ▁development ▁and ▁work ▁by ▁spir aling ▁around ▁the ▁ax on , ▁sometimes ▁with ▁as ▁many ▁as ▁ 1 0 0 ▁revolution s . ▁ ▁A ▁well - develop ed ▁Schw ann ▁cell ▁is ▁sh aped ▁like ▁a ▁rolled - up ▁sheet ▁of ▁paper , ▁with ▁layers ▁of ▁my elin ▁between ▁each ▁co il . ▁The ▁inner ▁layers ▁of ▁the ▁wrapping , ▁which ▁are ▁pre domin antly ▁memb rane ▁material , ▁form ▁the ▁my elin ▁she ath , ▁while ▁the ▁outer most ▁layer ▁of ▁nucle ated ▁cy top las m ▁forms ▁the ▁neur ile m ma . ▁Only ▁a ▁small ▁volume ▁of ▁resid ual ▁cy top las m ▁allows ▁communication ▁between ▁the ▁inner ▁and ▁outer ▁layers . ▁This ▁is ▁seen ▁hist olog ically ▁as ▁the ▁Schmidt - L anter mann ▁in cis ure . ▁ ▁Reg ener ation ▁ ▁Schw ann ▁cells ▁are ▁known ▁for ▁their ▁roles ▁in ▁supporting ▁n erve ▁reg ener ation . ▁N erves ▁in ▁the ▁P NS ▁consist ▁of ▁many ▁ax ons ▁my elin ated ▁by ▁Schw ann ▁cells . ▁If ▁damage ▁occurs ▁to ▁a ▁n erve , ▁the ▁Schw ann ▁cells ▁aid ▁in ▁dig estion ▁of ▁its ▁ax ons ▁( ph ag oc yt osis ). ▁Following ▁this ▁process , ▁the ▁Schw ann ▁cells ▁can ▁guide ▁reg ener ation ▁by ▁forming