B6-025 Skin Development Flashcards
acts as a storage center for lipids and water; shock absorber
hypodermis
skin movements are limited by [2]
retinacula cutis fibers
fasciae
allows dermis and fasciae to glide on each other
retinucula cutis fibers
melanocytes derive from
neural crest
sensory receptors in skin derive from
neural crest
mesenchyme/connective tissue of skin in the cranial region derives from
neural crest
what layer of the skin arises from non-neural ectoderm?
epidermis
what layer of skin arises from neural ectoderm?
dermis and hypodermis in head and neck
temporary protective layer cast off into amniotic fluid later in development
periderm
5 layers of epidermis
stratum corneum
stratum lucidum (thick skin)
stratum granulosum
stratum spinosum
stratum basale
langerhans cells and spinous cells are found in which layer of epidermis?
stratum spinosum
melanocytes reside in what layer of epidermis?
stratum basale
what layer of skin is responsible for fingerprints?
stratum basale
abundant tonofibrils with desmosomes
stratum spinosum
caused by excessive keratinization of the skin
harlequin ichthyosis
globally reduced or absent pigmentation
albinism
loss of melanocytes in patches of skin, hair, and oral mucosa due to autoimmune disorder
vitiligo
patchy absence of hair pigment
piebaldism
patches of white skin and hair
irises of eyes are different colors
deafness
Waardenburg syndrome
antigen presenting immune cells of the epidermis
Langerhans cells
where in the skin do blood vessels lie?
dermis
papillary layer of the dermis forms […] to increase the surface area
dermal papillae
what layer of skin contains roots of hair, hair bulbs, and hair papillae?
reticular layer of the dermis