Unit 3 The Integumentary System. Skin (1) - Notes PDF
Document Details
Uploaded by PositiveElation
Universidad Europea
Tags
Summary
These notes provide an outline and detailed descriptions of the accessory structures of the skin, including hair and various glands. The document also explains functions like protection and thermoregulation, and discusses clinical connections, such as acne. Information on glands, including sebaceous and sweat glands, is included.
Full Transcript
OUTLINE 3.3 Accessory structures of the skin. 3.3.1 Hair 3.3.2 Glands Sebaceous Sweat Ceruminous 3.4 Functions of skin © Copyright Universidad Europea. Todos los derechos reservados SEBACEOUS GLANDS Simple branched acinar glands ØThey open to the hair follicle or directly to the skin ØSecretory...
OUTLINE 3.3 Accessory structures of the skin. 3.3.1 Hair 3.3.2 Glands Sebaceous Sweat Ceruminous 3.4 Functions of skin © Copyright Universidad Europea. Todos los derechos reservados SEBACEOUS GLANDS Simple branched acinar glands ØThey open to the hair follicle or directly to the skin ØSecretory portion of the gland in the dermis ØAbsent in the palms and soles. ØHolocrine glands that produce sebum onto the epidermal surface: Composition: triglycerides, cholesterol, proteins and salts. Functions: Protection (avoids skin and hair dehydration) Makes hair and skin smooth Inhibits bacterial and fungal growth © Copyright Universidad Europea. Todos los derechos reservados SEBACEOUS GLANDS Clinical connection: acne © Copyright Universidad Europea. Todos los derechos reservados SWEAT GLANDS © Copyright Universidad Europea. Todos los derechos reservados SWEAT GLANDS: ECCRINE or MEROCRINE glands Simple coiled tubular glands ØExcretory conduct releases sweat on the surface of epidermis. ØStart working soon after birth. ØSweat contains water, salts, uric acid, urea, ammonia. ØPresent through all body surfaces, except lips, auditory conduct, glans. ØFunctions: oThermoregulation (insensible perspiration-sensible perspiration). oExcretion of urea, uric acid and ammonia, © Copyright Universidad Europea. Todos los derechos reservados SWEAT GLANDS: APOCRINE glands Simple coiled tubular glands ØMerocrine secretion (NO apocrine). ØConduct excretes to the hair follicle. ØSecrete oily substances containing lipids, proteins, and steroids. Secretion starts in puberty. ØFound in armpit, groin, breast areola, pigmented skin around the anus, bearded regions in male face. ØFunctions: oEmotional sweating and sweat during sexual activities. oNo thermoregulatory role. © Copyright Universidad Europea. Todos los derechos reservados SWEAT GLANDS: INFOGRAPHICS Simple coiled tubular glands © Copyright Universidad Europea. Todos los derechos reservados OTHER TYPE OF GLANDS Mammary glands • Compound tubuloacinar glands. • Secretion regulated by hormones. © Copyright Universidad Europea. Todos los derechos reservados Ceruminous glands • Modified sweat glands that produce a waxy secretion called cerumen. • Found in the external auditory meatus. • Barrier against the entrance of foreign bodies.
