Pernicious Anemia

Vitiligo
Vitiligo
Vitiligo Skin Disorder: Vitiligo Vitiligo is a skin condition whose exact cause is unknown. In vitiligo, patches of skin lose their pigmentation when the pigment producing cells, the 'melanocytes' are attacked and destroyed. It may affect the skin, mucous membranes, eyes, inner ear or hairs leaving white patches. The usual type of vitiligo is called 'Vitiligo Vulgaris' (means: common vitiligo). Variant types include linear, segmental, trichrome and inflammatory vitiligo. This disease affects an
Ethology
Ethology
Ethology The biological study of animal behavior is called Ethology. All behavior is a reaction to a stimulus. John B. Watson influenced animal behavior in the twentieth century. He published a book in 1924 called Behaviorism. Jakob von Uexkull and O. Heinroth started a school that taught about animal behavior. There are two categories of animal behavior: genetically determined or environmentally determined. Animal behavior is the different ways that animals do different things, such as hunt