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The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3] Within the latter type, the hairs occur in structures called pilosebaceous units , each with hair follicle , sebaceous gland , and associated arrector pili muscle. [ 4 ]
The skin weighs an average of 4 kg (8.8 lb), covers an area of about 2 m 2 (22 sq ft), and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are glabrous skin, the nonhairy skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [16]
Taenia solium, the pork tapeworm, belongs to the cyclophyllid cestode family Taeniidae. It is found throughout the world and is most common in countries where pork is eaten. It is a tapeworm that uses humans as its definitive host and pigs as the intermediate or secondary hosts. It is transmitted to pigs through human feces that contain the ...
Sarcoptes scabiei (/sɑː r ˈkɒptiːz skeɪˈbiːaɪ/ Traditional English pronunciation of Latin) or the itch mite is a parasitic mite found in all parts of the world that burrows into skin and causes scabies. Humans become infested by Sarcoptes scabiei var. hominis; [1] other mammals can be infested with different varieties of the mite.
Acne. What it looks like: Acne causes red, discolored bumps on the skin, along with whiteheads, blackheads, and cysts. Other symptoms to note: Acne is the most common skin condition affecting ...
Lichen planus ( LP) is a chronic inflammatory and autoimmune disease that affects the skin, nails, hair, and mucous membranes. [ 1][ 2] It is not an actual lichen, but is named for its appearance. [ 3] It is characterized by polygonal, flat-topped, violaceous papules and plaques with overlying, reticulated, fine white scale ( Wickham's striae ...
Psoriasis. Psoriasis is a long-lasting, noncontagious autoimmune disease characterized by patches of abnormal skin. [ 4][ 5] These areas are red, pink, or purple, dry, itchy, and scaly. [ 8][ 3] Psoriasis varies in severity from small localized patches to complete body coverage. [ 3] Injury to the skin can trigger psoriatic skin changes at that ...
Rodent mite dermatitis. Rodent mite dermatitis (also known as rat mite dermatitis) is an often unrecognized ectoparasitosis occurring after human contact with haematophagous mesostigmatid mites that infest rodents, such as house mice, [ 1] rats [ 2] and hamsters. [ 3] The condition is associated with the tropical rat mite ( Ornithonyssus bacoti ...