Bioperubatan - Akademi Sains Malaysia

Stratungranuloaum StralumcotneumHair8haftSweat ductMelkel'E dlacDgrmalpaplllaFree n9rv9sndlngMelaaner'scorPuacl€F-ac Vaaculaiplgxua.ynNeavetlbreSebtcaousglandArrectorpillmu9cl9Halr bulbPapillaHypodermlsPaclnlancorPugc19Adipor€ (fat)tlasuev€lnSwoal glandHslr tolllcleSkin and hairKIN is the body's largest organ, a waterproof barrierthat protecls the internal organs against infection,injury and harmful sun rays. The skin is also an importantsensory organ and helps to control body tomperalure,The outer layer of the skin, known as the epidermis, is coatedwith keratin, a tough, homy protein that is also the chiefconstituent of hair and nails.Dead cells are shed from the skin's sudace and arereplaced by new cells from the base ol the epidermis, theregion that also produces the skin pigment, melanin.The dermis contains most ot thg skin's living structures, andincludes nerve endings, blood vess€ls, elastic tibres, sweatglands that cool the skin and sebaceous glands that produceoil to keep the skin supple.Beneath the dermis lies the subcutaneous tissue (hypod€rmis),which is rich in fat and blood vessels. Hair shafts growfrom hair follicle situated in the dermis and subcutaneous tissue.Hair grows on every part of th€ skin apart from the palmsot the hands and soles of the fe€t - Ultimate visual DictionaN.zz esti&otmgL,at-:(E-Itl€dullaCutlcle