The Integumentary System Flashcards
Functions of the Skin
-Protection
-Excretion
-Sensory reception
-Thermoregulation
-Metabolic functioning
Epidermis cells
-Keratinocytes
-Melanocytes
-Dendritic cells
-Tactile cells
-Composed of a strong waterproofing protein
-Dead skin cells
Keratinocytes
-Produce melanin
-Responsible for skin pigment
Melanocytes
-Specialized white blood cells
-Migrate to the epidermis
-Function as phagocytes responsible for engulfing harmful foreign particles
Dendritic cells
-Present at epidermal-dermal junction
-Responsible for light touch reception
Tactile cells
5 Epidermal strata layers
-Stratum basale
-Stratum granulosum
-Stratum spinosum
-Stratum lucidum
-Stratum corneum
2 Distinct layers of the skin
-Epidermis
-Dermis
Layers of the dermis
-Papillary layer
-Reticular layer
2 types of glands that produce sweat
-Eccrine
-Apocrine
Finger print patterns
-Arch
-Loop
-Whorl
-Glands that release secretory products onto the external or internal body surfaces
-Secrete an oily, acidic substance called sebum into hair follicles
-Located everywhere except palms and soles
Sebaceous Glands
When body temperature rises during physical activity, increased ambient temperature, or fever, these glands respond by secreting sweat. This sweat is eventually evaporated from the surface of the skin, effectively cooling down body temperature.
Sudoriferous Glands
-Immediately deep to the stratum basale
-Consists of loose connective tissue
-Pain receptors (free nerve endings) and touch receptors (tactile corpuscles in hairless skin) found in this layer
Papillary layer
-Deepest layer of the skin
-Consists of dense, irregular connective tissue
-Accounts for 80% of dermal thickness
-Contains: collagen fibers for strength, elastic fibers for flexibility, reticular fibers as a supporting network for dermal structures
-Lamellar corpuscles are present here
Reticular layer
