Integumentary system Flashcards
Epidermis
Outer most layer of the skin.
Keratinocytes:Produce keratin.
Melanocytes:produce melanin
Langerhan cells:Immune cells that help protect against pathogens.
Merkel cells:Sensory cells that detect touch
Dermis:The layer beneath the epidermis,Much thicker too
Made up of connective tissue,containing collagen and elastin fibres.
Blood vessels
Nerve endings
Hair follicles and glands
Hypodermis
The deepest layer,Connecting the skin to the underlying tissues
Contains loose connective tissue and fat cells adipocytes.
Function:provid insulation,energy storage and cushioning.
Skin functions
Protection:Act as a barrier against pathogens,UV radiation and physical injury.
Sensation:Contains sensory receptors for touch,pressure,pain and temperature.
Themoregulation Regulates body temperature through sweat production and blood flow to the skin.
Vitamin D Synthesis:
Converts UV light to vitamin D essential for calcium absorption
Wound Healing Basics
Hemostasis:Blood vessels constrict and platelets for a clot.
Inflammation:White blood cells leukocytes clean the wound to prevent infection
Proliferation:New tissue forms including collagen,blood vessels filling the wound.
Maturation:The wound contracts and strengthens over time,scar tissue forms.
What is the main function of the epidermis?
Provides protection and serves as a barrier against pathogens
What type of cells produce melanin in the skin?
Melanocytes
How does the skin regulate body temperature?
Through sweat production and adjusting blood flow to the skin.
What are the two types of sweat glands?
Eccrine glands and apocrine glands
What is the role of the sebaceous glands?
To produce sebum,which lubricates and waterproofs the skin.
