Functions of the Integument
What is another name integument?
Skin
What are the variations of epidermis?
thickness, color, and skin markings
what are the 3 types of hair and the characteristics?
1) Lanugo- fine, unpgmented, downey hair
2) Vellus- fine hair, primary human hair
3) Terminal- coarser, pigmented, longer
Is the integument waterproof?
No, it is water-resistant
what is carotene?
yellow-orange pigment acquired from some vegetables?
1) hair bulb- surorunds hair papilla
2) root - proxima 1/3 of hair, from bulb to skin surface
3) shaft - distal 2/3 of hair, dead cells
By sweat ot transpiration
What connective tissue is a part of the subcutaneous layer?
Areolar and adipose connective tissue
What are the hair follicles function?
2) heat retention
3)sensory reception
4)visual indentification
How many layers are there of integument and what are the names?
1)Epidermis
2)dermis
3)subcutaneous
what structures are present in the dermis?
blood vessels, sweat glands, hair follicles, nail roots, sensory nerve endings
what is arector pili?
It is thin ribbons of smooth muscle, and it extends from the hair follicle to the dermal papillae and elevates hair with contractions ("goosebumps").
What are some functions for Integument?
1) protection from the external environment
2) prevention of water loss/gain
3)Vitamin D syntheis
4) secretion
5) absorption
6) immune function
7) temperature regulation
8) sensory receptions
what are the specialized cells in the epidermis?
1) dendritic cells
2) tactile cells
3) melanocytes
what is androgenic alopecia?
Male baldness, which includes loss of hair first from only the crown region of the scalp and includes genetic and hormonal factors.