Chapter 5: Integumentary System Flashcards
What is Integument
Integument= Cutaneous layer + Subcutaneous layer
- Includes: hair, nail, skin glands, sensory receptors
What are the functions of the skin
Protection
Vitamin D production
Temperature regulation
Excretion and absorption of substances
Sensory information
Skin protects us against
Pathogens
Water loss
UV rays ( Sun)
Skin helps us to regulate temperature through
Sweat glands
Cutaneous blood flow
Skin seeks sensory information by having
Sensory receptors provide information about the surrounding environment
Skin that has 4 layers is referred to as
Thin Skin
Present in areas we have HAIR
DOES NOT HAVE LUCIDUM
Stratum Corneum
Stratum Granulosum
Stratum Spinosum
Stratum Basale
Skin that has 5 layers is referred to as
Thick Skin
Present in areas of our bodies that do NOT have hair
Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum Spinosum
Stratum Basale
What are Keratinocytes
A cell that manufactures and stores the protein keratin
What are Melanocytes
Where Melanin is produced
What is Langerhans Cell
which functions as a macrophage by engulfing bacteria, foreign particles, and damaged cells that occur in this layer
What is a Merkel Cell
which functions as a receptor and is responsible for stimulating sensory nerves that the brain perceives as touch
Cutaneous layer
Dermis
- Thicker than the epidermis
-Supplied with blood vessels and nerves
- Composed of 2 layers:
- Papillary dermis
- Reticular dermis
Subcutaneous Layer
Storage of fat
Supplied with blood vessels nerves
Contains Lamellated Corpuscles (sensory receptors)
Hair Follicle is
Associated with a sebaceous gland
Associated with an arrector pili muscle
Sebaceous glands
Open into the hair follicle
Secrete oil (sebum)
