A&P Exam 3 Flashcards
Ch. 6
What are some functions of the skin?
resistance to trauma and infection, is a barrier for water, UV rays, vitamin D synthesis. As well as sensation, thermoregulation, and nonverbal communication.
Ch. 6
Skin is made of three main layers. What are they?
Epidermis, dermis, and hypodermis.
Ch. 6
Define Epidermis.
keratinized stratified squamous epithelium
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What is the deepest epidermal layer?
Stratum basale
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What are the five epidermal cell types?
Stem cells, keratinocytes, melanocytes, tactile cells, dendritic cells
Ch. 6
Thick skin is found…
palms of your hand, soles of your feet
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How many layers does thick skin have?
5
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How many layers does thin skin have?
4
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Where is thin skin located?
Everywhere besides the palms and soles of your feet.
Ch. 6
Define Dermis.
connective tissue layer beneath epidermis
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Define Dermal Papillae
upward, finger-like extensions of dermis
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Define Papilary Layer within the Dermis
superficial zone of dermis, one of the two layers of the dermis
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What kind of tissue is the Papilary layer made of?
loose areolar tissue
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Define Reticular Layer within the Dermis.
deeper and thicker layer of the dermis, beneath the papilary layer
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What kind of tissue is the Reticular Layer made of?
dense irregular connective tissue.
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What is the deepest layer of skin?
hypodermis
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What is special about the hypodemis?
it is technically not part of the skin, but included because dermis anchors to it.
Ch. 6
Define Melanin.
most significant factor in skin color, produced by melanocytes
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What are the two types of pigment in skin?
Eumelanin and Pheomelanin
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What other pigments can influence skin color?
Hemoglobin and Carotene
Ch. 6
Define Pilus
another name for hair
Where do you not find hair?
palms, soles, palmar, plantar, lips, nipples, parts of genitals