Intergumentary & Thermoregulation Flashcards
(27 cards)
The intergumentary system maintains…
Body integrity, body temp, converts inactive form of vitamin d to active form, provides sensory info and maintains homeostasis
The organs of the intergumentary system
Skin, hair, nails, glands and sensory receptors
Intergumentary means
To cover
Layers of the skin
Epidermis, dermis and subcutaneous (hyperdermis)
The epidermis contains 4 types of cells…
Keratinocytes, melanocytes, intrepidermial macrophages and tactile epithelial cells.
5 layers of the epidermis
Stratum basal, stratum spinosum, stratum granulosum, stratum lucidum and stratum corneum.
This epidermis covers…
All regions of the skin except the palms, palmar surfaces of digets and soles.
Thick epidermis covers
The palms, palmar surfaces of digets and soles
Skin pigments
Melatonin produced by melanocytes in the stratum basal
The dermis is composed of
Connective tissue containing collagen and elastic fibres.
The dermis contains two regions
The papillary regions and the reticular region
The subcutaneous layer
Attaches the skin to underlying tissues and organs
Two types of sensory receptors
Superficial and deep
Superficial sensory receptors contain
Free nerve endings, corpuscles of touch and the hair root plexus
Deep sensory receptors contain
Lamellated corpuscles
Parts of the hair…
The shaft (below skin surface), the follicle (below skin level) and a root that penetrates into the dermis
The skin contains 4 types of glands…
The sebaceous glands, eccrine sweat glands, apocrine sweat glands and the ceraiminous glands.
Two types of sudoriferous glands
Ecrine and apocrine
Ideal body temp
37
When core temp rises…
Pyrexial
When core temp falls
Hypothermic
What controls body temp
Hypothalamus
Physiological response to the heat and cold
Conduction, convection, radiation and evaporation
When it is cold the hypothalamus initiates
Peripheral vasoconstriction
