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 Feeding Habit. The feeding habit of zebras is a bit complex. Zebras are basically herbivores. They eat plain grass, shrubs, herbs, twigs, leaves, roots and bark from trees. Grass is the basic diet of mountain and plain zebras. It forms about 92% of their overall diets. They eat red grass, Bermuda grass that they find along the riverbeds and short grasses like common finger. Zebras also eat herbs and shrubs which constitute about 5% and 2% of their diet plan respectively.