Lecture 1.5: Skin Flashcards
What is the Cutaneous Plexus?
- Network of blood vessels present at
the junction of dermis/hypodermis. - Supplies the hypodermis, deeper
dermis, including the capillaries for
hair follicles and sweat glands.
What is the Subpapillary Plexus?
- Branches from the cutaneous plexus
- Lies deep to the papillary layer of the
dermis - Network of blood vessels providing O2
and nutrients to the upper dermis and
epidermis
What is the Hypodermis?
- The ‘subcutaneous’ layer (not considered apart of the skin
• Dominated by adipocytes that produce subcutaneous fat
• The subcutaneous fat stores
energy & provides insulation.
• Common site of injections
using hypodermic needles
Define a First-Degree Burn:
-Superficial i.e only involve
the outer layers of the
epidermis
• Red/pink, dry, painful -
Erythema.
• Usually no blisters e.g., a
mild sunburn
• Skin remains a water and
bacterial barrier
• Usually heals 3-10 days
Define a normal Second-Degree Burn:
– Epidermis + varying amounts
of dermis
– Painful, moist, red and
blistered.
– Usually heal in approx. 1-2
weeks (needs good dressings)
Define a Deeper 2nd degree burns:
- May include whiteish, waxy
looking areas
– Hair follicles, sweat glands
may remain intact
– Usually heal in 1 month
– May have some loss of
sensation and scarring
Define a Third-Degree Burn:
• Full thickness burns i.e., extend
into subcutaneous tissue and
may involve muscle and bone
• Varied color from waxy white
through to deep red or black
• Hard, dry and leathery skin
• No pain in these areas as
sensory nerve endings
destroyed
• May require skin grafting
• Weeks to regenerate + scarring
Which type of cell dominates the hypodermis?
adipocytes
The two layers of the dermis are..
Papillary and Reticular layer
The outermost layer of the skin is called..
Epidermis
A third-degree burn affects which of the following layers:
a) Hypodermis
b) Epidermis
c) Dermis
d) All the above
All of the above
