الواقع والحياد
مشرفة عامة
مسجل: مارس 2006
المكان: Saudi Arabia
المشاركات: 1,481
|
The Memory Cells are the second cell type produced by the division of B cells. These cells have a prolonged life span and can thereby "remember" specific intruders. T cells can also produce memory cells with an even longer life span than B memory cells. The second time an intruder tries to invade the body, B and T memory cells help the immune system to activate much faster. The invaders are wiped out before the infected human feels any symptoms. The body has achieved immunity against the invader.
|
![[فعاليات] اليوم العالمي للثلاسيميا 8 مايو World Thalassemia Day - 8 May](http://www.arabslab.com/vb/uploaded/1_01210183796.gif)
مختبرات العرب
