These genetic variants are believed to cause changes in the way the bodyâs T cells behave. T cells are immune system cells that normally fight off harmful invaders, such as viruses and bacteria. In people with psoriasis, however, T cells also attack healthy skin cells by mistake. This immune system response results in a range of reactions, including: 1  enlargement of blood vessels in the skin.  increase in white blood cells that stimulate the skin to produce new cells more quickly than usual.
Teeth. Zebra have several types of teeth that help them survive in their habitats. In the front of their mouths, zebra use their strong incisors for biting off grass and other vegetation. In the rear of their mouths, zebra have molars and premolars to grind down their food.
The Grevy'grÃ©vy s zebra is the largest of all wild. Equines it is.2â5.2 75 (m.8â2.9 0) ft from head to tail with aâ55 75 (cmâ22 30) in, tail and stands.1â45.1 6 (m.4â8.5 2) ft high at the. Shoulder these zebras weighâ350 450 (kgâ770 990). lbhe Grevy'grÃ©vy s zebra lives in-semi arid grasslands where it feeds on, grasses, legumes and; browse it can survive up to five days without. water