Dermis Flashcards
Two layers within dermis
Papillary and reticular
Papillary layer is mainly what
Pain receptors
Functions of dermis (3)
Highly vascularised > supplies nutrients to epi tissue
Involved in temp regulation
Protects underlying tissues
Where does endocrine release hormones to
Blood
Where does exoocrine release hormones to
Ducts
What are sweat glands
Coiled tubes of epithelial cells that open onto the surface of the epidermis
Eccrine is what
True sweat, mainly composed of water, aids in thermoregulation of the body
Apocrine is what and where does the secretion flow via and to
Found around armpits and glands. Sticky more viscous sweat. Secretion flows via ducts into hair follicles
Ceruminous glands explain
Modified apocrine glands
Ear canals
Wax
Mammary glands
Modified apocrine glands
Secrete milk
Oil glands are associated with what follicle? What secretion do they produce and why?
Hair follicles. Secrete sebum which lubricates the hair and protects the skin
Where are hair follicles derived from? (Which dermis’)
Epidermis + penetrate down into dermis
What are the hair follicles composed of
Concentric rings of keratinised cells
Is the keratin tougher in hair or in skin cells
Hair
3 pigments that determine hair colour
Melanin, trichosiderin and white hair
