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Nimkurahoi kaloni magzi sar

Sokhti nimkurahoi kaloni magzi sar. Nimkurahoi kalon yak juzi khub inkishofyoftai magzi sar ba hisob rafta, az tarafi rost va chap magzi mobayni va miyonaro mepushonand. Qabati qishrii magzi sar az moddai khokistarrang iborat buda, dar zeri on moddai safed mavjud ast. Dar dokhili in modda yakchand yadroro didan mumkin ast. Sathi on az chinho iborat ast. Juyakho va chinho sathi qishrro ba hisobi miyona to ba 2000-2500 sm2 ziyod mekunand. Beshtar az se du hissai sathi qishri az juyakho iborat ast. Dar in qabat ziyoda az 14 milliard neyronho mavjudand. Nimkurahoi kalon dar navbati khud az panj palla iboratand: 

  • pallai peshoni;
  • pallai chakka;
  • pallai farqi sar;
  • pallai aqibi sar;
  • jazira.

Ahamiyati qabati qishrii nimkurahoi kalon. Dar in qabat doirahoi hiskunanda va harakatro farq kardan mumkin ast. Ba doirai hiskunanda az uzvhoi his, pust, uzvhoi dokhili, mushakho va payho khabar meoyad. Dar vaqti ba hayajonoyii neyronhoi in doira hassosiyat ba vujud meoyad. Dar qismi aqibi magzi sar doirai bosira mavjud ast. Dar holati oseb didani in doira qobiliyati binoi sust yo qat megardad. Dar qismi chakka boshad, doirai somea joygir ast. Dar holati oseb didan dark kardani sadohoi gunogun qat megardad. Dar juyaki markazi qabati qishri doirai hassosiyati pustu mushak voqe ast. Inchunin dar qabati qishri markazhoi shomma va zoiqaro didan mumkin ast. 

Dar qismi peshi juyaki markazi doirai harakat mavjud ast. Dar holati ba hayajon omadani neyronhoi in markaz harakathoi beikhtiyor ba amal meoyand. Qabati qishri hamchun yak vohidi butun kor karda, asosi moddii faoliyati ruhii inson ba shumor meravad. Binobar in chunin vazifahoi baroi ruhiyat khos, ba monandi khotir, nutq, tafakkur va tanzimi raftor ijro karda meshavand.

Savolho 

  1. Sokhti nimkurahoi kalon chi khel ast?
  2. Qabati qishrii nimkurahoi kalon kadom vazifahoro ijro mekunand?
  3. Nimkurahoi kalon az chand palla iboratand?
  4. Dar in qabat kadom doirahoro farq kardan mumkin ast?
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