Anatomy & Physiology of the Skin Flashcards

Which of the following correctly lists the three primary layers of the skin from outermost to innermost?

Answer: Epidermis, dermis, hypodermis

The skin is composed of three layers: the epidermis (outermost), dermis (middle), and hypodermis/subcutaneous layer (deepest).

In which skin layer should micropigmentation pigment ideally be deposited to ensure long-lasting results?

Answer: Papillary dermis

Pigment placed in the papillary dermis is stable and long-lasting because this layer does not shed like the epidermis, yet is not so deep that pigment migrates or blurs.

Which specialized cells in the epidermis are responsible for producing melanin?

Answer: Melanocytes

Melanocytes are located in the stratum basale and produce melanin, the pigment responsible for skin, hair, and eye color.

Which layer of the epidermis is the deepest and is the site of active mitotic cell division?

Answer: Stratum basale

The stratum basale (basal layer) is the deepest epidermal layer where stem cells undergo mitosis to generate new keratinocytes that migrate upward.

Approximately how long does it take for epidermal cells to migrate from the stratum basale to the surface and be shed?

Answer: 28 to 45 days

The full epidermal cell turnover cycle is approximately 28 to 45 days, which is why pigment placed too superficially fades quickly as cells shed.

Which component of the dermis is responsible for the skin's tensile strength and structural support?

Answer: Collagen fibers

Collagen fibers, produced by fibroblasts, provide the primary tensile strength and structural integrity of the dermis.

What is the Fitzpatrick scale used to classify in the context of micropigmentation?

Answer: Skin types based on their response to ultraviolet light

The Fitzpatrick scale (Types I–VI) classifies skin based on its reaction to UV exposure, helping micropigmentation artists anticipate how pigment may appear and heal across different skin tones.