Skin Glands Flashcards
Types of Skin glands
1) Sebaceous glands
2) Sweat glands;
-Eccrine
-Apocrine
What aspect of common integument is modified to make skin glands
The epidermis- although they penetrate into the dermis
Sebaceous glands
- Associated with hair follicles
- Lobed structure
- Produce oily sebum (or lanolin)
Functions of sebum or lanolin
- Moisturise and waterproof hair and skin
- Allows sweat to spread (thermoregulation)
- Antimicrobial
-Pheromones, scented compounds for communication
Circumoral glands
Sebaceous gland in cats
Around the tactile hairs by the mouth
Scent marking and greeting
Carpal glands
sebaceous gland in cats and pigs
near carpus bone
scent marking
Circumanal glands
sebaceous glands in dogs
Apocrine sweat glands
- Discharge albuminous sweat
- Into hair follicles
- Over most haired skin
Eccrine sweat glands
-Discharge more watery sweat
-Directly onto the skin
-Only found on naked skin
Mode of cellular secretion- apocrine glands
APOCRINE SECRETION
Vesicles pinch off from cells to secrete packets of cell membrane and cytoplasm
Mode of cellular secretion- eccrine glands
MEROCRINE SECRETION
exocytosis
cell vesicle fuses with membrane to discharge its contents
no part of cell is lost
Mammary glands
- Very modified apocrine sweat gland
-new function; provide protein-rich milk for young, with antibodies for immune transfer
How is milk made?
Produced by mammary cuboidal epithelial cells lining alveoli
Alveoli are surrounded by muscle cells (myoepithelial cells) push milk out of alveolus
Milk drains through milk ducts
Stored in lactiferous sinus
