Chapter 4 Accessory Organs Glands Hair Nails Glands Organ that releases a substance into or out of the body Sebaceous oil glands Sudoriferous sweat glands Sebaceous oil Glands All over the body except palms and soles ID: 778260
Download The PPT/PDF document "Accessory Organs of the Skin" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Accessory Organs of the Skin
Chapter
4
Slide2Accessory Organs
Glands
Hair
Nails
Slide3Glands
Organ that releases a substance into or out of the body
Sebaceous (oil) glands
Sudoriferous (sweat) glands
Slide4Sebaceous (oil) Glands
All over the body (except palms and soles)
Secrete
sebum
Oily mixture of cholesterol and cellular debris
Human
defensin
(antimicrobial substance)
Keeps the hair and skin soft & pliable
Prevent water evaporation
Open onto a hair follicle
Increase secretion in response to sex hormones
Puberty
Slide5Sebaceous Gland Disorders
Acne vulgaris
Overactive/
inflammed
sebaceous glands
Caused by hair follicles blocked with sebumInflammatory response causes small red elevation
Slide6Sudoriferous (sweat) Glands
Coiled, tubular glands located in the dermis
On average, 1 in
2
of skin contains _____ sweat glands?
650Eccrine
sweat glands
Apocrine sweat glands
Slide7Eccrine Glands
Forehead, neck, back
Open onto skin surface
Begin functioning at birth
Respond throughout life due to body temperature
Produce sweat that assists in regulating body temperature
99% water
Salt, urea, lactic acid
Composition varies with diet/heredity
Slide8Apocrine Glands
Genital/anal regions; axillary region
Open onto a hair follicle, not the skin
Begin functioning at puberty, under the influence of sex hormones
Sweat does not assist in temperature regulation
Sweat is more
viscous
(sticky/thick)
Yellow-white/milky color
Odorless when secreted
Bacteria metabolize the sweat and secrete waste
body odor
Slide9Specialized Sweat Glands
Mammary glands
Secrete milk
Modified sweat glands
Ceruminous
glands
External ear canal
Secrete
cerumin
(earwax)
Repels insects, traps dust
Modified sweat glands