asthi majja

chaupaaye jaanvaron ki asthimjja

gre shareer vigyaan mein bon mairo/ majja koshika

majja ya meru (angreji:bon mairo) asthiyon (haddiyon) ke andar bhara hua ek mulaayam ootak hota hai. vayaskon mein badi asthiyon mein majja rakt koshikaaen nirmaan karne mein sahaayak hota hai. ismein kul shareer bhaar ka 4%^[1] samaahit rahata hai, yaani lagbhag 2.6 ki.gra, vayaskon mein.

asthimjja goode ke samaan mrudu ootak hai jo sab asthiyon ke spanji bhaag ke avakaashon mein, lambi asthion ki madhyanalika ki guha mein aur bade aakaar ki hevarsi nalikaaon mein paaya jaata hai. bhinn-bhinn asthiyon mein aur anu ke anusaar uske sanghatan mein antar hota hai. majja do prakaar ki hoti hai - peeli aur laal.

peeli majja ka aadhaar taantav ootak hota hai jismein raktavaahikaaeain aur koshikaaeain pai jaati hain jinmein adhikaansh vasaakoshikaaeain hoti hain. kuchh laal majja ke samaan koshikaaeain milti hain.

laal majja ka aadhaar sanyoji ootak hota hai jiske dhaaainche ke jaal mein rajataraagi (arajeeraufilik) tantu aur usase sambandhit jeevaanubhakshi koshikaaeain tatha kai prakaar ki raktakanikaaeain aur unke poorvagaami roop, kuchh vasaakoshikaaeain tatha kuchh linf parv hote hain.

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  majja pratyaaropan