SKIN & APPENDAGES. PROF. DR. FAUZIAH OTHMAN DEPT OF HUMAN ANATOMY. Contents:. Function of skin Epidermis- layer & cell of epidermis Dermis –papillary layer & reticular layer Subcutaneous tissue Blood vessels & skin sensorial receptors Hairs Nails
PROF. DR. FAUZIAH OTHMAN
DEPT OF HUMAN ANATOMY
hair follicle, sweat gland & sebaceous gland.
- cushions the body from stress and strain.
Deep thicker area=
-composed of loose areolar connective tissue
(Constriction and expansion control the amount of blood that flows through the skin and dictate whether body heat is dispelled when the skin is hot or conserved when it is cold.)
1. Sebaceous glands
( produce oily lipid that coat hair shafts & the epidermis)
2. Sweat glands
( produce watery solution & perform other special functions.)
( triacylglycerides+ cholesterol+ proteins + electrolyte)
* Names refer to the mechanism of the secretion
The terms thick and thin refer to the thickness of the epidermis. Most of the body is covered by thin skin, which is 0.003 inches (0.08 millimeters) thick. This skin contains hair follicles, sebaceous glands, and arrector pili muscles.
The epidermis in thick skin may be six times thicker than the epidermis that covers the general body surface. Thick skin does not have hair, smooth muscles, or sebaceous glands. Thick skin on the palms of the hands, the fingertips, and soles of the feet may be covered by many layers of keratinized cells that have cornified.