Term
| What function does the integumentary system do and what is it composed of |
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Definition
The integumentary system functions to keep the external out and internal in (a covering), waterproofing, maintain body temperature, synthesizing vitamin D & housing sensory receptors
It is composed of three things: skin, nails, and hair |
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Term
| Name the three layers of skin |
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Definition
| Epidermis, dermis & hypodermis |
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Term
| Name the four types of cells in the epidermis |
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Definition
| Keratinocytes, melanocytes, Langerhan's cells & Merkel cells |
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Term
| Name the five layers of the epidermis |
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Definition
| Stratum corneum, stratum lucidum (thick), stratum granulosum (lamenated granules), stratum spinosum (Langerhan's cells/ dendritic cells) & stratum basale (Merkel cells/ melanocytes) |
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Term
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Definition
| Melanocytes produce melanin that provides skin color and protects against UV rays |
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Term
| Describe some characteristics of the dermis |
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Definition
| It is highly vascularized, contains hair follicles, sweat & oil glands, innervated & flexible and strong |
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Term
| What is the sweat gland called |
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Definition
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Term
| What is the hypodermis mainly composed of |
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Definition
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Term
| What are oil glands called |
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Definition
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Term
| Where is the arrector pili muscle located; epidermis, dermis or hypodermis |
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Definition
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Term
| Where is the papillary layer located |
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Definition
| In between the epidermis and dermis layers, ridge looking layer |
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Term
| Ther dermal papillary layer contains |
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Definition
collagen, elestic fibers and is vascularized
But some aso contain: Meissner receptors, capillary layers & free nerve endings |
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Term
| Where are friction ridges found and what are they made of |
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Definition
Palms and soles of the hands and feet
They are made of epidermal ridges and dermal ridges |
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Term
| In which of the five layers of the skin are germinal cells located |
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Definition
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Term
| What are pacinian corpuscles and where are they located |
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Definition
| Pacinian corpuscles sense pressure and are located in the reticular layer of the dermis |
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Term
| What is another name for the hypodermis and what is its major function |
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Definition
| also called the superficial fascia and functions to absorp shock and insulate |
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Term
| The sweat glands are located in the dermis, what are the two types of sweat glands |
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Definition
Eccrine sweat glands (very primative)-respond to elevations in temperature and emotional responsive
Apocrine sweat glands- become active during puberty |
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Term
| What do eccrine glands look like and where are they found |
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Definition
| Eccrine glands are coiled and tubular found in the dermis |
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Term
| Give some description of the acidity and composition of eccrine sweat |
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Definition
| Slightly acidic (pH 4-6) and is composed of: water, salt, vitamin C, antibodies, dermicidin & metabolic wastes |
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Term
Give some description on where (pheromones) apocrine sweat glands are located and what they secrete
also what are they two modified apocrine glands called |
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Definition
Largely located at the apogential & axillary areas
The secrete mostly protein and fatty acids into the hair follicle region
ceruminous- ear wax
mammary gland- milk |
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Term
| What type of gland is a sabaceous gland and how does it work |
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Definition
A sabaceous gland secretes sebum-an oil that makes hair waterproof and pliable
Its gland works like a holocrine gland- cells multiply and burst!
Are alveolar shaped |
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Term
| What is the composition of hair and hair follicle |
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Definition
| Keratinized cells-mostly dead |
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Term
| Name the two types of hair |
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Definition
| Vellus and terminal (coarse) |
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Term
| Black hair has what and blonde hair has what |
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Definition
eumelanin-black
pheomelanin- blonde |
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Term
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Definition
| Hair thinning- not replaced as fast as it is shed |
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Term
| Name the three steps in tissue repair |
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Definition
Inflammation: capillaries dilate, WBCs, antibodies & clotting factors seep into wound
Organization: fibroblasts release collagen to bridge tissue gap and restore vascularity
Regeneration: the fibrosed area and epithelium has regenerated |
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Term
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Definition
| The support of collagen under the skin decreases as we age, stress and smoke |
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