epidermis
Outermost layer of skin
Provides protection from infection, abrasion, chemicals, and ultraviolent
radiation
Assist with heat regulation, retention, and dissipation
Vascular and water resistant
Contains melanocytes (skin color)
Regenerates rapidly, quick healing with normal conditions
dermis
2nd layer of skin, 20-30 times thicker than epidermis
Contains blood vessels and lymphatics, nerve endings, and sensory neurons that
supply epidermis
Contains hair follicles, sweat glands, sebaceous glands, and nails
Supported by collagen, elastin, ground substance which provides structure,
strength, flexibility, and elasticity
stratum corneum (1)
Most superficial layer of the epidermis consisting of dead cells
F: protection from fungi/bacteria, cell regeneration, regulates absorption of
chemicals and organisms
stratum lucidum (2)
A layer of the epidermis found only in the thick skin of the fingers, palms, and
soles
F: help these areas withstand friction
stratum granulosum (3)
, Aids in keratin formation and helps to s strengthen the skin
stratum spinosum (4)
contains involucrin which increases resistance to invading organisms and
Langer-han cells that are first immunologic line of defense
stratum basale (5)
cells enable the epidermis to regenerate
melanocytes found here determine skin pigment
Hypodermis (subcutaneous layer)
Composed of loose connective tissue and adipose tissue; functions as a site for
storage, shock absorber, insulates deep tissue, and anchors skin to underlying
tissues.
Functions of the Skin?
1. protection of internal structures
2. sensory perception
3. thermoregulation
4. excretions
5. absorption
6. Social communication
Primary intention
Does not involve loss of tissue and includes surgical closure of wound
Secondary intention
Involves some degree of tissue loss, edges can't be easily approximated heal by
secondary intention, formation of granular tissue to FILL IN scar
Tertiary intention
First allowed to heal on its own, followed by surgical closure, used for infection
What changes occur to the skin with aging?
Over time skin loses its ability to function as efficiently:
Pigmentation (paler when young)
Skin thickness: parchment like, over bony prominences; hands: feet: legs
Outermost layer of skin
Provides protection from infection, abrasion, chemicals, and ultraviolent
radiation
Assist with heat regulation, retention, and dissipation
Vascular and water resistant
Contains melanocytes (skin color)
Regenerates rapidly, quick healing with normal conditions
dermis
2nd layer of skin, 20-30 times thicker than epidermis
Contains blood vessels and lymphatics, nerve endings, and sensory neurons that
supply epidermis
Contains hair follicles, sweat glands, sebaceous glands, and nails
Supported by collagen, elastin, ground substance which provides structure,
strength, flexibility, and elasticity
stratum corneum (1)
Most superficial layer of the epidermis consisting of dead cells
F: protection from fungi/bacteria, cell regeneration, regulates absorption of
chemicals and organisms
stratum lucidum (2)
A layer of the epidermis found only in the thick skin of the fingers, palms, and
soles
F: help these areas withstand friction
stratum granulosum (3)
, Aids in keratin formation and helps to s strengthen the skin
stratum spinosum (4)
contains involucrin which increases resistance to invading organisms and
Langer-han cells that are first immunologic line of defense
stratum basale (5)
cells enable the epidermis to regenerate
melanocytes found here determine skin pigment
Hypodermis (subcutaneous layer)
Composed of loose connective tissue and adipose tissue; functions as a site for
storage, shock absorber, insulates deep tissue, and anchors skin to underlying
tissues.
Functions of the Skin?
1. protection of internal structures
2. sensory perception
3. thermoregulation
4. excretions
5. absorption
6. Social communication
Primary intention
Does not involve loss of tissue and includes surgical closure of wound
Secondary intention
Involves some degree of tissue loss, edges can't be easily approximated heal by
secondary intention, formation of granular tissue to FILL IN scar
Tertiary intention
First allowed to heal on its own, followed by surgical closure, used for infection
What changes occur to the skin with aging?
Over time skin loses its ability to function as efficiently:
Pigmentation (paler when young)
Skin thickness: parchment like, over bony prominences; hands: feet: legs
