Integumentary System

Topics: Skin, Dermis, Organ Pages: 2 (666 words) Published: April 23, 2012
The integumentary system also known as skin; surrounds the entire human body therefore being the largest organ. The skin and its annexes like hair, sweat glands, sebaceous glands, nails, etc. The main functions of the integumentary system is to function as a protective barrier, that keeps our body free from intrusion of foreign materials, microorganisms and prevents dehydration as well as protecting from desiccation and there are other functions also helps in elimination of waste products and in the regulation of our body tempeture. There are many other functions of the integumentary system and each organ involved in this system has its own particular use The main parts of the integumentary system are the skin which divides in three layers the epidermis, dermis and subcutaneous layer; hair, nails, areector pilli, sebaceous glands and sweat glands. In order to understand the different functions of the integumentary system you have to understand the different functions of each of the parts The epidermis: the most  outermost layer of the skin. Is about 20 to 30 cells thick and the cells are keratinized and dead which is what gives the skin its waterproof quality. Its also where the growth of skin takes place. The dermis: the second layer of skin, directly beneath the epidermis. Unlike the epidermis, the dermis has its own blood supply. Because of the presence of this blood supply, more complex structures are able to exist here. Sweat glands are present to collect water and various wastes from the bloodstream, and excrete them through pores in the epidermis. The dermis is also the site of hair roots, and it is here where the growth of hair takes place. By the time hair reaches the environment outside of the skin, it is completely dead. The dermis also contains dense connective tissue, made of collagen fibers, which gives the skin much of its elasticity and strength. Subcutaneous Layer: The last layer of the skin containing the adipose...
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