श्वेत रक्त कोशिका

[[chitr:Red-and-White-Blood-Cells.jpg|thumb|250px|shvet tatha lal rakt koshikaean]] shvet rakt koshika (aangrezi: White Blood Cells or WBCs) manav sharir mean sahaj pratiraksha pranali ka mukhy bhag haian. in koshikaoan ka jivan kal kuchh din se lekar varshoan ka hota hai. ye lal rakt koshikaoan se b di, kiantu sankhya mean kam, aniyamit akar ki evan kendrak yukt hoti haian. manushy ke ek ghan milimitar rakt mean inaki sankhya lagabhag 7500 (6000-10,000) tak hoti hai.

vishesh biandu

• in rakt koshikaoan mean himoglobin nahian paya jata, isalie ye safed ya rangahin hoti haian.
• shvet rakt koshikaean ya shvetanu ya lyookosaits sharir ki sankramak rogoan aur bahy padarthoan se raksha karane vali pratiraksha pranali ki koshikayean haian.
• lyookosaits paanch vibhinn aur vividh prakar ki hoti haian, lekin in sabhi ki utpatti aur utpadan asthi majja ki ek maltipoteant, himetopoeeetik stem sel se hota hai.
• ye koshikaean poore sharir mean paee jati haian, jisamean rakt aur lasika pranali shamil haian.
• manav rakt mean in koshikaoan ki sankhya prayah kisi rog ka soochak hoti hai. amataur par rakt ki ek litar matra mean 4×10⁹ se lekar 1.1×10¹⁰ ke bich shvet rakt koshikayean hoti haian, jo kisi svasth vayask mean rakt ka lagabhag ek pratishat hota hai.
• in koshikaoan ke bhautik gun, jaise- matra, chalakata aur kanikamayata, sakriyan, aparipakv koshikaoan ki upasthiti, ya shvetaraktata ki halat mean ghatak lyookosaits ki upasthiti ke karan badal sakate haian.
• shvet rakt koshikaoan ki sankhya mean oopari sima se adhik huee vriddhi 'shvetanuvriddhi' ya 'lyookosaitosis' kahi jati hai, jabaki nimn sima ke niche ki sankhya ko 'shvetanuhras' ya 'lyookopeniya' pukara jata hai.

panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh

sanbandhit lekh

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