Layers of Epidermis
Outermost, keratinized part of the epidermis
Stratum corneum
Portion of the hair from the scalp down
Hair root
Protective covering of the ends of fingers and toes
Nails
Sebum is the name for the secretions of
sebaceous glands
Occurs when too much ultraviolet radiation reaches the skin and causes an inflammation or reddening due to dilation or peripheral blood vessels
Acute Sunburn
Appears as a clear layer on their palms and the soles
Stratum Lucidum
Tube like depression of epidermal cells extending down into the dermis; completely surrounds the root of the hair and the hair papilla
Hair follicle
Produced from epidermal cells; is continuous with the skin
Nail bed
Sebum is composed of
oily secretions
Begins when ultraviolet radiation mutates the DNA of a skin cell
Skin Cancer
Cells underneath the stratum lucidum
Stratum granulosum
Portion of the hair form the scalp up
Hair Shaft
Portion lying over the nail bed
Nail pate
Acts to keep hair and skin soft, pliable, and waterproof
Sebum
Superficial skin inflammation or irritation resulting from either an immune response or exposure to an irritant
Contact Dermis
Cells located within dermal papillae
Stratum spinosum
Projection of connective tissue
Hair Papillae
Most actively growing portion of the nail; shaped like a half moon; located at the base of the nail plate when it grows, it pushes the nail plate over the nail bed
Lunula
Sebaceous glands are always associated with
hair follicles
Inflammation of sebaceous gland caused by hormones signaling an increased release of sebum
Acne
Layer of cells attached to the basement membrane; contains melanin containing cells called melanocytes
Stratum basale
Bundles of Hair Follicles cover the scalp
Hair
How many layers do nails have
50
Sebaceous glands are absent on the
palms and the soles
Bacteria thrive in oil-clogged hair follicles and trigger an immune reaction
pimple