Integumentary System III Flashcards
What are the types of sebaceous (oil) glands?
- Simple branched alveolar glands
2. Sebaceous follicles
What are simple branched alveolar glands associated with?
Hair follicles and not found in hairless skin
What do Sebaceous follicles do?
Discharge sebum (lipid secretion) directly onto skin surface
What are Sebaceous follicles not associated with?
Hair
Where are Sebaceous follicles mostly found?
Face, chest and back
Where are Apocrine sweat glands found?
Armpits and eyelids
How do Apocrine sweat glands secrete products into hair follicles?
Via merocrine secretion
Why is the sweat secreted smelly?
The sticky, cloudy
secretions produced feed bacteria causing the odour
What are Apocrine sweat glands surrounded by?
Myoepithelial cells
What do Myoepithelial cells do?
squeeze secretion out in response to hormonal or nervous system
What are Merocrine sweat glands?
Coiled, tubular glands
that discharge directly
onto skin surface
How is the distribution of Merocrine sweat glands like?
Widely distributed on skin surface
What is the composition of the sweat produced by Merocrine sweat glands?
99% water
plus salt, etc
What are some of the diverse functions of Merocrine sweat glands?
- Protection from environment hazard
- Maintenance of pH
through secretions of
water and salt
What are some other Integumentary glands?
- Mammary glands: Produce milk
2. Ceruminous glands: Produce cerumen (earwax) which protects the eardrum from foreign particle
What glands do the Autonomic nervous system (ANS) control?
Sebaceous gland and
apocrine gland throughout body at the same time
What glands have precise control with local effects and work with CVS to regulate body temperature?
Merocrine (eccrine) glands
When does Repair of the integument occur?
When bleeding occurs resulting in a skin injury
How does Repair of the integument occur?
- Inflammatory Phase
- Migratory Phase:
- Proliferation Phase
What occurs during the Inflammatory Phase?
- Bleeding occurs
- Mast cells trigger inflammatory response
What occurs during the Migratory Phase?
- Formation of Scab
- Cells of Stratum Basale migrating along edges of wound
- Phagocytic activity (Macrophage & Fibroblast)
- Clotting begins
What occurs during the Proliferation Phase?
- Collagen fiber meshwork
produced by fibroblast - Phagocytic activity almost ended
- Fibrin clot dissolving
What occurs during the Scarring Phase?
- Scab has been shed
- Epidermis is complete
- Fibroblasts continue to create scar tissue
When does the Inflammatory Phase occur?
Immediately after skin injury
When does the Migratory Phase occur?
A few hours after skin injury
When does the Proliferation Phase occur?
A week after skin injury
When does the Scarring phase occur?
A few weeks after skin injury
Does the Repair of the Integument continue after the Scarring phase?
Yes, number of capillaries decline, noncellular scar tissue is produced and a raised keloid may form
What are the different types of Burns?
- First-degree burns
- Second-degree burns (partial thickness burns)
- Third-degree burns (full thickness burns)
What layer of the skin does 2nd degree burn affect?
Epidermis and dermis (lower layer of skin)
What layer of the skin does 3rd degree burn affect?
Go through the dermis and affect deeper tissues (epidermis and dermis destroyed)
What are the symptoms of burns?
- Blisters
- Pain
- Peeling skin
- Red skin
- Shock Swelling
- White or charred skin
What are some common symptoms of 3rd degree burns?
- Dry and leathery skin
- Black, white, brown, or yellow skin
- Swelling
- Lack of pain because nerve endings have been destroyed
How do we treat 3rd degree burns?
- Early cleaning and debriding
- IV fluids (electrolytes) or oral antibiotics
- Antibiotic ointments or creams
- Warm, humid environment
- Pain medications
- Skin grafting
- Functional and cosmetic reconstruction
- Tetanus shot
What are the effects of Aging on the skin?
- Epidermal thinning
- Decreased numbers of dendritic cells
- Decreased vitamin D3 production
- Decreased melanocyte activity
- Decreased glandular activity
- Reduced blood supply
- Decreased function of hair follicles
- Reduction of elastic fibers
- Decreased hormone levels
- Slower repair rate