Integumentary System Flashcards
Primary organ of the integumentary system and the largest organ of the body.
Skin
Outer layer of the skin that is composed of stratified squamous epithelium and lacks blood vessels. It consist of 4 to 5 layers depending on the type of the skin.
Epidermis
Inner layer of the skin that is thicker than the epidermis
Dermis
It is a subcutaneous layer or superficial fascia, not a part of the skin but is often
studied along with skin
Hypodermis
Has 5 layers that can be found on the palms of th hand and solee of the feet
Thick skin
Has 4 layers that covers the most of the body
Thin skin
The deepest layer attached to the basement of membrane
Stratum basale
The other word for stratum basale
Stratum germinativum
Is the most common cell that undergoes cell division
Keratinocyte
Produces protein keratin that makes the skin almost water proof
Keratinocyte
Scattered among the keratinocyte that produces pigment melanin
Melanocyte
Pigment that is due to exposure in UV light
Melanin
It serve as a touch receptor
Tactile cells
Spinous/ prickle layer the appearance is due to shrinking or the microfilaments between desmosomes
Stratum spinosum
Is the granular layer where keratinization process begin
Stratum granulosum
It is only found on thick skin, comes from the fact that it is translucent, allowing light to pass through
Stratum lucidum
A superficial layer, consist of dead squamous cell filled with keratin
Stratum corneum
An abnormal thickening of the stratum corneum
Callus
Other word of nipples
Dermal pipilae
Where hair arises, an extension of the epidermis that originates deep
in the dermis)
Hair follicle
Where hair arises, an extension of the epidermis that originates deep
in the dermis)
Hair follicle
The hair protrudes
above the surface of the skin
Hair shaft
Part of the hair that are below the surface
Root and hair bulb
A hard layer that
surrounds the medulla
Cortex
Soft center of the hair
Medulla
A single layer of over-lapping cells that covers the cortex
Cuticle
Are smooth muscle cells that
Contracts causing the hair to
“stand on end” and produces a
Raised area of the skin (goose
bumps)
Arrector pili
Produce a secretion that is mostly
water with a few salts
and located in almost every part of the
skin but numerous in the palms &
soles
Eccrine sweat glands
Are simple, coiled, tubular glands
that produce a thick secretion rich
in organic substances
Apocrine sweat glands
What does sebaceous glands produce?
Sebum
Is an onion-shaped structure
built up around the nerve ending
that reduces the mechanical sensiti-
vity of the nerve terminal itself
Pacinian corpuscle
The portion that is not visible
Nail root
Also known as cuticle, is the stratum corneum of the epidermis
Eponychium
Is the thick white part of the nail
Lunula
Is the skin below the nail plate
Nail bed
Is the visible portion of the nail
Nail body
Extend past the finger or toe
Free edge
Secure nail to the fingertip
Hyponychium
Is the epithelium proximal to the nail root. It contains dividing cells, which produce new nail cells
Nail matrix
