Nails - bacterial decomposition occurs. Precise function...

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Nails: Scale-like modifications of the epidermis that forms a clear protective covering on the dorsum of the distal part of a finger or toe. Each nail has a free edge, a body, and a root embedded in the skin. The thickened proximal part of the nail bed - nail matrix - is responsible for nail growth. Nail cells are heavily keratinized. Nail body slides distally over the nail bed during growth. Sweat Glands: More than 2.5 million sweat glands are distributed over the entire body. Two types of sweat glands: eccrine and apocrine. Eccrine - more numerous especially on the palms, soles and forehead. They secrete a hypotonic solution (sweat) derived from blood plasma. It is 99% water with some other substances in it. Sweating is regulated by the sympathetic nervous system. Assists in thermoregulation. Apocrine - largely confined to the axillary and anogenital regions. They are larger in size. The secretions are the same as eccrine with the addition of fatty substances and proteins which make the secretions viscous. The secretions are odorless until
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Unformatted text preview: bacterial decomposition occurs. Precise function unknown. Activated by the sympathetic nervous system during pain or stress. Ceruminous Glands - secrete ear wax. Mammary Glands - secrete milk. Sebaceous (oil) Glands: Simple glands found all over the body except on the palms and soles. They are small on the body trunk and limbs and larger on the face, neck, and upper chest. Secrete an oily secretion called sebum. The sebum is usually ducted into a hair follicle. Sebum softens and lubricates the hair and skin and it has a bactericidal action. Acne is an active inflammation of the glands accompanied by "pimples." Acne is usually caused by bacteria, especially staphylococcus. Homeostatic Imbalances: Because of the skin's complexity and extensiveness, it can develop more than 1000 different conditions and ailments. The most common skin disorders result from bacterial, viral, or yeast infections....
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