रक्त कोशिका
thumb|300px|rakt koshikaean rakt koshika athava 'rakt kanika' (aangrezi: Blood cell) rakt mean payi jati hai. plajma ke atirikt shesh rakt ka lagabhag 40-45 pratishat bhag rudhiranuoan ka bana hota hai. is bhag ko 'himetokrit' kahate haian.
prakar
manushy ke rakt mean nimnalikhit tin prakar ki rakt koshikaean ya rudhiranu paee jati haian-
- lal rakt koshika
- shvet rakt koshika
- rakt pletalets
ye tinoan koshikayean milakar lagabhag 45 pratishat rakt ootakoan ka nirman karati haian, shesh 55 pratishat bhag plavika se banata hai.
lal rakt koshika
lal rakt koshika shvasan aangoan se aauksijan lekar sare sharir mean pahuanchane ka aur karban daeeaksaeed ko sharir se shvasan aangoan tak le jane ka kary karati hai. inaki kami se 'raktalpata' (enimiya) ka rog ho jata hai. manav sharir mean karib paanch litar rakt vidyaman rahata hai. lal rakt koshika ki ayu kuchh dinoan se lekar 120 dinoan tak ki hoti hai. isake bad isaki koshikaean tilli mean tootati rahati haian. parantu isake sath-sath asthimajja mean isaka utpadan bhi hota rahata hai. yah banane aur tootane ki kriya ek nishchit anupat mean hoti rahati hai, jisase sharir mean rudhir ki kami nahian ho pati.
shvet rakt koshika
shvet rakt koshikayean sahaj pratiraksha pranali ka mukhy bhag haian, inaka jivan kal kuchh din se lekar varshoan ka hota hai. ye lal rudhir kanikaoan se b di, kiantu sankhya mean kam aniyamit akar ki evan kendrak yukt hoti haian. manushy ke ek ghan milimitar rudhir mean inaki sankhya lagabhag 7500 (6000-10,000) tak hoti hai. inamean himoglobin nahian paya jata hai, isalie ye safed ya rangahin hoti hai.
bimbanu
bimbanu rakt ka thakka jamane mean mahatvapoorn bhoomika nibhate haian. ye keval staniyoan ke rudhir mean hi paee jati haian. manushy ke rakt mean inaki sankhya 2.5 lakh prati ghan milimitar hoti hai. ye ati sookshm, kendrakavihin, sankuchanashil, gol ya andakar, ubhayottar evan plet ke akar ki hoti haian. inamean 15 pratishat vasa, 50 pratishat protin hoti hai. inaka kary kshatigrast bhag se bahate hue rakt ka thakka jamana hai. thakka jamane se us sthan se rudhir ka bahana band ho jata hai. inaka jivanakal 1-8 ya 10 din hota hai.
rakt koshikaoan mean kami raktakshinata ka karan banati hai. doosari or vriddhi p aaulisaithimiya kahalati hai.
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tika tippani aur sandarbh
sanbandhit lekh