Trypanosomiasis refers to a group of diseases caused by Trypanosoma There are two types of trypanosomiasis that affect humans, they are divided according to their geographical location: African trypanosomiasis, or sleeping sickness, is caused by Trypanosoma brucei parasites in sub-Saharan Africa and is transmitted by the tsetse fly? (Glossina).
Specilized cells in the epidermis called melanocytes produce melanin, a dark pigment that provides skin color. Melanin absorbs ultraviolet radiation in sunlight and preventing mutations in the DNA of skin cells and other damaging effects.ifferences in skin color result from differences in the amount of melanin that melanocytes produce and the distribution and size of pigment granules. Skin color is genetically determined.
Skin is composed only of the epidermis. Newly formed cells, produced by the basal layer, push to the surface of the skin. Epidermal cells harden due to the production of keratin, a waterproof protein.Specialized cells in the epidermis called melanocytes produce melanin.The dermis contains hair follicles, oil and sweat glands, sense receptors, and the arrector pili muscle.kin is composed only of the epidermis. Newly formed cells, produced by the basal layer, push to the surface of the skin. Epidermal cells harden due to the production of keratin, a waterproof protein.