The skin is the largest organ of our body. it takes up about 22square feet of coverage and weights about eight pounds. 

Five basic sensations of the skin are : pressure, touch, temperature,  heat/col, and  pain. 

The three layers of the skin are the horny zone, the Germinal zone and the Dermis 

Strtatum corner stratum lucid and stratum granulosem are the layers of the horny zone top layer of the epidermis. made up of flattened keratinized cells… nuclei are no longer evident here. 

The five layer of epidermis are the Stratum corner, the stratum lucidum, stratum granulosem, Prickle cell layer, and the basal layer. 

seven things found in the dermis are 

capillary blood vessels responsible for bringing o2 and nutrients to the skin. also carries away waste to be expelled thru the lungs. 

Lymphatic Vessels – drain away waste 

Sensory nerve endings – responsible for sending impulses and sensations to the brain… pain , heat cold etc.. this helps us protect ourselves 

Sweat Glands deep in dermis – tube shaped – take materials from our blood and make them into something new – passes thru duct to the skins follicles and helps to regulate body temperature. two kinds of sweat glands 

Apocrine glands – found in the areas of pelvis, underams, breast, genitals body heat management and waste control 

Eccrine glands excrete water and salt   these are found all over the body. many on soles of hands and feet. respond to UV distress, radiation, emotions, fever. 

Sebaceous glands all over the skin… not on soles of feet or hands. secrete sebum. found all over body more on face and scalp. less on back and rest of body. oo much sebum gives a greasy appearance. too little results in dry skinand brittle hair. hormone imbalance greatly affects this . 

the subcutis is made up of loose soft connective tissues – separates the dermis from the muscle and allows our skin to move more easily over it. blood vessels and lymph vessels found here. fat cells act as a storage – thicker in woman than men 

Skin Functions- Protect, Sense, regulate heat, excrete and secrete, 

Skin types – Dry – dull chalky flaky and tight after washing 

Oily – shiny greasy to touch, pores visible blackheads and blemishes common 

normal skin – soft, supple, clear, fine grained texture, no oiliness or dryness – hardly anyone has this glorious gene. 

Combination skin oily centre, forehead nose chin – cheeks dry – usually comes with aging very common 

Sensitive skin – redness, allergies to products, irritates with little provocation, needs to be protected from extreme water… 

Aging skin – looser, thinner epidermis and dermis – doesn’t produce its own oil or moisture well anymore. 

Teen skin – hormonal acne, dirt issues, blockages, possible infections