Knowledge of dermatomes is essential to carry out neurological examination. The area of skin supplied by a single segment of spinal nerve is called dermatome. Incisions made along or parallel to the Langer’s lines will severe fewer fibers as a result the healing is faster and the scar formation is minimal. They run longitudinally in the limbs and circumfrentially in the neck and trunk. Langer’s lines or clevage lines are the lines on the surface of skin which are caused due to the orientation of collagen fibers in the dermis. Direction of the collagen fibers produces clevage/Langer lines. Reticular layer – consists of dense irregular connective tissue containing larger blood vessels,nerve endings, lymphatics, and epidermal appendages, elastic and collagen fibers that are arranged in layers parallel to the surface.It form projections called dermal papillae, which fit into reciprocal depressions of epidermis. Papillary layer- consists of loose connective tissue containing elastic, reticular, collagen fibers and capillaries ( help in nourishing epidermis).The dermis is composed of two layer – papillary layer(superficial layer) and reticular layer(deeper layer). Stratum lucidum ( is found only in thick skin of palm and sole).Acts as a sense organ:Is provided with various types of sensory endings for the perception of sensations such as pain, touch, heat & cold.Įpidermis is made up of keratinized stratified squamous epithelium, therefore like all epithelia, it is avascular.In winters heat is conserved due to the presence of the subcutaneous fat and hair.radiation from the dilated blood vessels.secretion and evaporation of sweat from sweat glands,. ![]() ![]() In summers the excess heat is lost from the body by.Thermoregulation : Helps in maintaining normal body temperature.Protection: Protect the body from mechanical injury and pathogens.13.0.3 Incisions are preferably made parallel to cleavage/Langer’s lines.11 How is the Degree of Burns Assessed in Extensive Burns?.10 Enumerate the Areas of Skin with Abundant Sebaceous Glands.9 Enumerate the Areas of skin Devoid of Sebaceous Glands.8 Enumerate the Pigments that Contribute to the Colour of Skin.
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