The integumentary system (2) Flashcards
1
Q
function of hair
A
- Thermoregulatory properties (hair stands up when cold to trap warm hair)
- releases sebum form sebaceous glands, act as prptective layer om skin and improves the barrier function skin
- massive socila and economic impact
2
Q
How does hair grow ?
A
- Anagen active
active growth phase (3-6 years) - Catagen
transition phase (1-2 weeks) - Telogen
resting phase (5-6 weeks)
3
Q
structure and fuction of finger nails and toe nails
A
- made up of keratin, they are tough and hard
- protect sensitive finger tips
- acts as a counter pressure to increase stimulus and increase sensation in finger tips
3
Q
structure and fuction of finger nails and toe nails
A
- made up of keratin, they are tough and hard
- protect sensitive finger tips
- acts as a counter pressure to increase stimulus and increase sensation in finger tips
4
Q
Nerves of the integumetary system
A
- very closlsey linked to sympahthetic nervous system
- nerves in skin form receptors—> sensitive to touch
- concentrated in areas such as finger tips, lips
5
Q
Glands of the integumentary system
1. Merocrine
A
- Apocrine -linked to specific areas (eg, axilla (armpit), nipple, pubic area, anus
- Produce sweat which is essential for thermoregulation
6
Q
Glands of the integumentary system
2. Sebaceous glands
A
- Oil producing gland
- Usually attached to hair follicle
- Produce sebum, a fatty substance plays a protective role in barrier of skin.
7
Q
Integumentary system links to other systems such as:
A
- nervous sytem
- vascular system
8
Q
what are the 4 stages of wound healing ?
A
- Hemostasis- blood clot forms and bleeding is halted
- Inflammatory - infiltration by macrophages/ Langerhans cells to fight off bacteria + bibroblasts to produce extracellular matrix to close wound
- ** Proliferation** - fibroblasts proliferate and epithelial cells start to cover the wound
- **Remodeliing **- the cella of dermis and epidermis re-organise to reduce scarring (can take yrs)
9
Q
how many degree burns are there ?
A
4
10
Q
First degree burns
A
- only affects epidermis
- painful
- dry, no blisters
11
Q
Second degree burns
A
- epidermis affected and SOME of dermis
- blisters
- swollen
- painful
12
Q
Third degree burns
A
- destroy the epidermis and dermis
- may go to subcutaneous tissue
- may look white or charred and blackned
13
Q
Fourth degree burns
A
- involves both epidermis, dermis and subcutaneous tissue
- can slo involve muscle and bone
- no pain, due to nerve damage
14
Q
Skin cancer
1. basal cell carcinoma (BCC)
A
- affacts basal epithelil cells
- mostly found on sun exposed areas
- often inviolved surgical removal
