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What 3 pigments contribute to skin color?
What makes yellow to reddish-brown to black? Responsible for dark skin colors?
Where is melanin produced?
Melanin migrates to where?
What happens when melanin moves to keratinocytes?
pigment shield are forme for nuclei
What are to locations of local accumulation of melanin?
What makes yellow to orange color in skin?
Where is carotene most obvious?
palms and soles
What is responsible for the pinkish hue of skin?
Appendages/Derivatives of the epidermis are:
- Sweat glands
- Oil glands
- Hairs and Hair follicles
What are the two main types of sweat glands?
Eccrine and apocrine
Eccrine sweat glands are __________.
Where are eccrine glands abundant?
palms, soles, and forehead
What 6 things make up sweat?
- Vit C
- Metabolic wastes
Ducts of eccrine sweat glands connect to ________.
Eccrine sweat glands function in ____________.
Apocrine sweat glands are confine to __________ and ________ areas.
axillary and anogenital
What makes up sebum?
sweat + fatty substances and proteins
Ducts of apocrine glands connect to ________ ____________.
When are apocrine sweat glands functional?
from puperty onward
What are the 2 functional apocrine glands?
- cercuminous glands
- mammary glands
What are the widely distributed glands?
sebaceous oil glands
Sebacious oil glands are most developed from __________ _____________.
When do sebacious glands become active?
Why is sebum important?
- oily holocrine secretion
- softens hair & skin
Alerting the body to presence of insects on the skin and guarding the scalp against physical trauma, heat loss, and sunlight are important functions of __________.
Where is hair not distributed?
- portions of external genitelia
What does hair consists of?
dead keratinized cells
__________ keratin is more durable than __________ keratin.
Hair pigments: melanins make what colors?
Gray/white hair is caused by decreased ___________ production and increased ________ _________ in shaft.
melanin, air bubbles
Where is the hair follicle located?
extending from the epidermal surface into the dermis
The two layered wall of the hair follicle is outer ___________ __________ root sheath, and inner ___________ root sheath.
connective tissue, epithilial
What is the expanded deep end of the hair follicle?