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Integumentary System

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Sunshine Billeter

on 8 September 2012

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Transcript of Integumentary System

The Skin Skin protects us from viruses, Skin also is a sense organ. It lets us feel things by touch, such as hot and cold, and pain. It excretes sweat to keep us cool in the summer time, oils to keep it soft and moist. It also helps our bodies produce vitamin d, which is essential to help keep us healthy. Why do we have skin? Sensitive
Broken capillaries
Damaged blood vessels Normal Shiny appearance Course texture Bouts
of acne Enlarged pores Oily Scarring Acne-Prone Extreme bouts of acne Blemishes Painful cysts Combination Skin Bouts of acne nose chin forehead around Cheeks and neck tend to be dry firm smooth Naturally small pores healthy glow Dry Appearance feels
rigid few bouts with acne Crinkled appearance thanks to aging Regeneration of new cells become sluggish Mature Loses elasticity, Lines and crows feet develop around the eyes and mouth Its the first line of defense. How does the skin work? Skin "keeps us in" and"everything else out" The surface layer is dead kartin-cells
Swells with moisture
Sheds daily
Thickens and hardens due to friction
Excessive friction can cause burns, blisters, or corns to develop. What are the components of Skin? What are the components? What are the different types? How does it work? What can happen to it? Different types of skin Leathery Under the Surface Layer, Contains Living Cells Epidermis Layer Protects against pathogens Helps prevent dehydration Cells continually divide to replace dead cells that flake off Cell here have a short "life" span Signs of nutritional deficiency develop quickly here Can tell us how healthy we are Protects against injury Protects against invasion of parasites Protects us from the "bad stuff" Contains Melanin That Helps Give Us Our Color The Dermis (middle) Layer Melanin protects the "underlying" layers from Ultraviolet (UV) Radiation Wrinkles originate here Sensory receptors and nerves tell the body about temperature changes
They also alert the body to Touch, Pressure, & Pain Blood vessels tranport nutrients and oxygen to the skin Gives the skin its strength and flexibility Lymph vessels carry white blood cells to the skin to fight off microbes Sweat glands regulate temperature by transporting water to the surface where it evaporates and cools the body down Collagen holds muscles and organs in place and gives strength and shape to them Elastin is a rubbery material that makes skin stretchable The thickest layer of the skin The Hypodermis or Sub-cutaneous Composed of fat and loose connective tissue Protects us from damage & keeps our insides safe Insulates the body Protects internal organs from injury Connects skin to underlying tissues through collagen, elastin & reticular fibers that extend from the dermis Stores excess energy as fat Blood vessels, lymph vessels, nerves and hair follicles also extend through this layer of the skin. The deepest layer of skin Replica of fat tissue Primary Function is sexual attraction Hair Covers the whole body, except the palms of the hands and the soles of the feet Present as either "terminal" or "vellus" Terminal is hair on the scalp Vellus is the fine, short hairs that covers the rest of the body Result of cell division within the hair folicle Hair on the scalp grows about .33 mm per day Eyebrow hair grows faster than scalp hair Loss of hair in males is inherited and androgen-dependant, starting at about the age of 20, & gradually convert to fine vellus hairs Baldness may be inheireted, caused by infection or immunological disorders Made up of hardened keratin Nails Protects the tissues of your fingers and toes The health of your nails can be a clue to your overall health Healthy nails are smooth and consistant in color Specific types of nail discoloration and changes in growth rate can signal various lung, heart, kidney and liver diseases, as well as diabetes and anemia. White spots and vertical ridges are harmless. Keeping nails clean, dry and trimmed can help avoid problems Do not remove the cuticles, this can cause infections Nail problems that sometimes need treatment are: tumors, warts, fungal infections, and ingrown nails Things that can happen Cut Rash Burns Bruise Acne
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