Skin Flashcards
The primary organ of the Integumentary system & the largest
organ of the body
Skin
It is a continuous sheet of
cutaneous membrane
It consists of the skin & accessory structures
such as hair, glands & nails (integument means covering)
Integumentary system
What are the major functions of the integumentary system?
Major functions: protection, sensation, Vit. D production,
temperature regulation & excretion
The two major layers of the skin
Epidermis and dermis
The outer layer of the skin; is composed of stratified
squamous epithelium; lacks blood vessels
Epidermis
What is the epidermis composed of?
Stratified squamous epithelium
It is the inner layer of the skin; is thicker than the epidermis
Dermis
It is the masses of loose connective
& adipose tissues that bind the skin to the underlying organs; is
not a true layer of the skin
Subcutaneous layer/hypodermis
It has 5 layers; found on the palms of the hand and soles
of the feet
Thick skin
It has 4 layers that covers most of the body
Thin skin
What is the other name of stratum basale?
Stratum germinativum
The deepest layer attached to the
basement membrane
Stratum basale
The deepest layer attached to the
basement membrane
Stratum basale
It consists of cuboidal or
columnar cells that undergo
mitotic divisions about every
19 days
Stratum basale
How many does the stratum basale undergo mitotic division?
19 days
How many does the stratum basale undergo mitotic division?
19 days
What cells are in the stratum basale
Keratinocyte,
melanocyte & tactile cells
What cells are in the stratum basale
Keratinocyte,
melanocyte & tactile cells
It is the most
common cell & undergoes cell
division; produces the protein
keratin that makes the skin
almost waterproof
Keratinocyte
It is the most
common cell & undergoes cell
division; produces the protein
keratin that makes the skin
almost waterproof
Keratinocyte
It scattered
among the keratinocytes;
produces the pigment
melanin in reaction to
exposure UV light
Melanocytes
It serves as
touch receptors
Tactile cells
Spinous layer/prickle layer
Stratum spinsoum
