Lecture 2: Anatomy of the skin Part 2 Flashcards
1
Q
what are the accessory structures of the skin?
A
hair, sweat glands, receptors, nails
2
Q
what is hair made of? what does it consist of?
A
- made of keratinized dead cells produced inside hair follcile
- the hair shaft projects from follcile
it consists of:
arrector pili muscle
- contraction produces goosebumps and insulation
root hair plexus
- collection of sensory nerves on base of each hair follicle
- heightens sensation
3
Q
what do eccrine sweat glands do?
A
- found in most parts of skin
- secretes watery secretions on skin surface
- important for thermoregulation and secretion
- some antibacterial action
4
Q
what do apocrine glands do?
A
- found in armpit, groin and around nipple
- sticky, oily, odorous secretions into base of hair follicle
- influenced by hormones e.g. breastmilk
5
Q
how does smoking affect skin aging?
A
- tobacco smoke causes premature skin aging
- contains agents that accelerates aging
- damages collagen and elastin
- linked with poor wound healing, acne, skin + oral cancers
6
Q
how does vaping affect skin aging?
A
- contains nicotine
- nicotine reduces blood circulation in dermis
- contact dermatitis due to metal coating on e-cigarettes
7
Q
how does tattoo influence lymph nodes?
A
tattoo ink can pigment that lymph nodes and can sometimes look like melanoma
8
Q
how is pain felt during tattoo?
A
pain during tattoo is due to the dermal layer containing pain receptors and free nerve endings
9
Q
explain the thickness of tumour and correlation with mortality
A
10
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11
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12
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13
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14
Q
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