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.
Equus grevyi can be found in the plains and are larger type zebras. They have many more strips than the smaller zebras. The plains zebras are the most common type of zebra. So the zebraâs habitat has a lot to do with their size and health. Zebras can live anywhere from twenty to thirty years in the wild.Because the zebras all migrate they have longer legs and hard hooves.earning about a Zebraâs Habitat. To learn about a zebra it helps to know about the zebraâs habitat. Where these horse like animals thrive and flourish, gives us a peek into how they live and survive.