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ANALAB (1st Shifting)
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What are the 2 major tissue layers of the skin?
Epidermis and Dermis
Most
superficial
layer of the skin
Epidermis
Name all of the layers of the Epidermis
Come Lets Get Sun Burnt
Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum Spinosum
Stratum Basale/Germinativum
What is the outermost layer of the Epidermis?
Stratum Corneum
How many layers of dead squamous cells does the Stratum Corneum have?
25-30
or more layers of dead squamous cells (
keratinocytes
)
Waterproof layer of the Epidermis
Stratum Corneum
3-5 layers of dead flat keratinocytes
Stratum lucidum
Stratum lucidum is only found in _
Thick skin
3-5 of flattened dying keratinocytes
Stratum granulosum
Layer with no dividing cells
Stratum granulosum
8-10 rows of keratinocytes with thorn-like projections
Stratum spinosum
What is the deepest layer of the epidermis?
Stratum basale/germinativum
Single row of
keratinocytes
attached to the
basement membrane
Stratum Basale/Germinativum
Deeper
layer of the skin
Dermis
What are the 2 layers of the Dermis
Papillary
and
Reticular
Contains
Finger-like projections
Dermal Papillae
Genetically determined whorls called
epidermal ridges
in
thick skin
Deeper and much thicker layer of the Dermis
Reticular layer
What are the accessory structures of the skin
Hair
,
Nails
, and
Glands
Columns of dead keratinized cells bound by extracellular proteins
Hair Strand
What part of a hair strand projects from the surface of the skin?
Shaft
What part of a hair strand penetrates the
dermis
?
Root
Layers of the
Hair
Inner Medulla
,
Middle Cortex
,
Outer Cuticle
What is the tightly packed keratinized epidermal cells that cover the dorsal surface of each digit?
Nail
Part of the
nail
that extends past the digits
Free edge
Whitish
half-moon shaped proximal area of the nail
Lunula
Beneath the free edge of the nail. It secures nail to fingertip
Hyponychium
Narrow band of dermis that adheres to the nail
Eponychium
Types of Exocrine Glands
Mammary
Ceruminous
Sebaceous
Sweat/Sudoriferous
Eccrine
glands produce
600
mL sweat/day
Sweat perceived as moisture on the skin
Sensible
Sweat that evaporates before one perceives it as moisture
Insensible
Secretion is commonly referred as “cold sweat”
Apocrine Glands
Sweat glands on the palms of the hand and soles of the feet
Eccrine Glands
Sweat
glands found in the armpits and groin area
Apocrine Glands
4 Types of Tissues in the human body
Epithelial
Connective
Muscle
Nervous
Responsible for coordinating and controlling many body activities
Nervous
A tissue that contracts or shortens, making movement possible
Muscle
A diverse primary tissue type that makes up part of every organ in the body
Connective
A covering or lining tissue
Epithelial
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