ABC

Sweat Pores

Hypodermis

Hairs

Dermal papilla

Motor nerve fiber

Hair follicle

Hairs

Sensory nerve fibers

Sweat pores

Dermis

Hair follicle

Hair Bulb

Sensory nerve fibers

Dermal papilla

Motor nerve fibers

Hair follicle

Apocrine Sweat glands

Dermal papilla

Dermis

Pressure receptor

Dermis

Epidermis

Sensory nerve fibers

Sweat pores

Dermis

Epidermis

Hypodermis

Pressure receptor

Apocrine sweat glands

Epidermis

Hair follicle

Pressure receptor

Sensory nerve fiber

Dermal papilla

Cutaneous blood vessels

Sensory nerve fibers

Hair follicle

Sweat pores

Motor nerve fibers

Hair follicle

Pressure receptor

Epidermis

Motor nerve fibers

Hypodermis

Hairs

Dermis

Epidermis

Dermis

Pressure receptor

Sweat pores

Cuticle

Free edge

Nail bed

Nail body

Cuticle

Nail bed

Cuticle

Nail bed

Lunula

Lunula

Cuticle

Free edge

Nail body

Nail bed

Cuticle

By the time the cells reach the outermost layer- called stratum corneum- all that’s left of the dead cells is their keratin. The newly arriving flattened cells called keratinocytes, they replace the dead cells that flake away with daily wear As the cells are pushed upward, they stop dividing and instead produce keratin, a tough, fibrous protein. The keratin replaces the cytoplasm and nucleus in each cell. The cells flatten, and as they move further away from their blood supply, they die The stratum basale, or basal layer, also called the stratum germinativum- is the innermost layer. It consists of a layer of columnar stem cells. These stem cells continually undergo mitosis, producing new skin cells. As new cells are produced, they push the older cells upward, toward the skin’s surface

The stratum basale, or basal layer, also called the stratum germinativum- is the innermost layer. It consists of a layer of columnar stem cells. These stem cells continually undergo mitosis, producing new skin cells. As new cells are produced, they push the older cells upward, toward the skin’s surface As the cells are pushed upward, they stop dividing and instead produce keratin, a tough, fibrous protein. The keratin replaces the cytoplasm and nucleus in each cell. The cells flatten, and as they move further away from their blood supply, they die By the time the cells reach the outermost layer- called stratum corneum- all that’s left of the dead cells is their keratin. The newly arriving flattened cells called keratinocytes, they replace the dead cells that flake away with daily wear

As the cells are pushed upward, they stop dividing and instead produce keratin, a tough, fibrous protein. The keratin replaces the cytoplasm and nucleus in each cell. The cells flatten, and as they move further away from their blood supply, they die The stratum basale, or basal layer, also called the stratum germinativum- is the innermost layer. It consists of a layer of columnar stem cells. These stem cells continually undergo mitosis, producing new skin cells. As new cells are produced, they push the older cells upward, toward the skin’s surface By the time the cells reach the outermost layer- called stratum corneum- all that’s left of the dead cells is their keratin. The newly arriving flattened cells called keratinocytes, they replace the dead cells that flake away with daily wear

Inner, deeper layer

Outermost layer

Beneath

Inner, deeper

Outermost

Beneath the skin

Inner, deeper layer

Outermost

Beneath the skin layer

t consists of stratified squamous epithelial tissues. It contains no blood vessels; instead, it obtains oxygen and nutrients by diffusion from the dermal layer beneath it

It is composed of connective tissues that contain primarily collagen fibers (which strengthen the tissue), but it also contains elastin fibers (which provide elasticity) and reticular fibers (which blind the collagen and elastic fibers together). It contains a large number of blood vessels in addition to sweat glands, sebaceous glands, and nerve endings

It is made up of loose connective (areolar) tissue and adipose tissue. The hypodermis blinds the skin to the underlying tissue Hypodermis that's composed mostly of adipose tissue is called subcutaneous fat this layer of fat helps insulate the body from outside temperature changes; it also acts as an energy reservoir

Arises in the epidermis and is slow-growing Often occurs on the scalp, forehead, backs of the hand, and top of the ears Has a raised, red, scaly appearance Some forms may metastasize

Most deadly of all skin cancers Sometimes develops from melanocytes of a preexisting mole Metazasizes quickly and is often fatal when not treated early Risk is greatest in individuals who had severe sunburns as children

The most common type Seldom metastasizes, it is the least dangerous Arises from the cells of the stratum basale, typically on the nose or face Lesion fist appears as a small, shiny bump; as it enlarges, it often develops a central depression and a beaded, “pearly” edge

Most deadly of all skin cancers Sometimes develops from melanocytes of a preexisting mole Metazasizes quickly and is often fatal when not treated early Risk is greatest in individuals who had severe sunburns as children

The most common type Seldom metastasizes, it is the least dangerous Arises from the cells of the stratum basale, typically on the nose or face Lesion fist appears as a small, shiny bump; as it enlarges, it often develops a central depression and a beaded, “pearly” edge

Arises in the epidermis and is slow-growing Often occurs on the scalp, forehead, backs of the hand, and top of the ears Has a raised, red, scaly appearance Some forms may metastasize

Arises in the epidermis and is slow-growing Often occurs on the scalp, forehead, backs of the hand, and top of the ears Has a raised, red, scaly appearance Some forms may metastasize

Most deadly of all skin cancers Sometimes develops from melanocytes of a preexisting mole Metazasizes quickly and is often fatal when not treated early Risk is greatest in individuals who had severe sunburns as children

The most common type Seldom metastasizes, it is the least dangerous Arises from the cells of the stratum basale, typically on the nose or face Lesion fist appears as a small, shiny bump; as it enlarges, it often develops a central depression and a beaded, “pearly” edge

A genetic lack of melanin

gives a person their skin color and forms a cap over the top cell nucleus to protect it from the exposure to the harmful ultraviolet rays of the sun

Impaired liver function (such as from hepatitis or liver disease) that allow bile to accumulate, which stains the skin

The breakdown of clotted blood under the skin

keep the skin and hair from drying out and becoming brittle sebum has a mild antibacterial and antifungal effect.

the most numerous of the skin glands

They secrete waxy substance called cerumen, or ear wax.

They secrete waxy substance called cerumen, or ear wax.

open into a hair follicle, secrete an oily substance called sebum.

the most numerous of the skin glands

They secrete waxy substance called cerumen, or ear wax.

open into a hair follicle, secrete an oily substance called sebum.

the most numerous of the skin glands

Involves the epidermis as well as part of the dermis Results in blisters, severe pain, and swelling May result in scarring May appear red, white, or tan

Involves only the epidermis Causes redness, slight swelling, and pain Often results from sunlight (sunburn)

Extends through the epidermis and dermis and into the subcutaneous layer May not be painful initially because of the destruction of nerve endings May appear white or black and leathery Often requires a skin graft

Involves the epidermis as well as part of the dermis Results in blisters, severe pain, and swelling May result in scarring May appear red, white, or tan

Extends through the epidermis and dermis and into the subcutaneous layer May not be painful initially because of the destruction of nerve endings May appear white or black and leathery Often requires a skin graft

Involves only the epidermis Causes redness, slight swelling, and pain Often results from sunlight (sunburn)

Involves the epidermis as well as part of the dermis Results in blisters, severe pain, and swelling May result in scarring May appear red, white, or tan

Extends through the epidermis and dermis and into the subcutaneous layer May not be painful initially because of the destruction of nerve endings May appear white or black and leathery Often requires a skin graft

Involves only the epidermis Causes redness, slight swelling, and pain Often results from sunlight (sunburn)