6. Integumentary System Flashcards
2 parts of the integumentary system
Epidermis
Dermis
Lining of epidermis
Stratified squamous
4 cell types in epidermis
Keratinocytes
Melanocytes
Langerhans cells
Merkels cells
Most numerous cell in the epidermis
Keratinocytes
Cells that produces keratin
Keratinocytes
Most numerous protein in the SKIN or Epidermis
Keratin
Most numerous protein in the BODY
Collagen
Most numerous protein in the MUSCLE
Actin
Most numerous protein in the BLOOD
Albumin
Cells that produce melanin
Melanocytes
Yellow-red melanin
Pheomelanin (“phe-ow”)
Brown - black melanin
Eumelanin
Protects us from UV
Melanocytes (melanin)
Are melanocytes resistant or sensitive to light/UV?
Very sensitive to UV or light
What is the embryonic origin of melanocytes
Neural crest cells
2 cells that are derived from neural crest cells
Melanocytes
Neuroglia (glial cells)
Supporting cells of neurons
Neuroglia or glial cells
Macrophage of the epidermis
Langerhans cells
Epidermal layer where langerhans are present
Stratum spinosum
Mechanoreceptor for sense of TOUCH seen in the EPIDERMIS
Merkel cells
Mechanoreceptor for LIGHT TOUCH that is seen in the DERMIS
Meissner corpuscles
Which is more sensitive Merkel or Meissner?
Meissner corpuscles
Least numerous cell in the epidermis
Merkel cells
Merkel cells are located in what layer of epidermis
Stratum basale
Layers of EPIDERMIS: Superficial to Deep
Come, Let’s Get Sun Burned
Corneum Lucidum Granulosum Spinosum Basale
Deepest layer of epidermis
Basale
2 epidermal layers which are sites of tonofilament production
Basale and Spinosum
Layer of epidermis with HIGHEST MITOTIC ACTIVITY of KERATINOCYTES
Stratum Basale
Future keratin
Tonofilaments
2 other names of stratum spinosum
Spiky layer
Prickle cell layer
Epidermal Cell layer with decreased mitotic activity of keratinocytes
Spinosum
Combination of stratum basale and spinosum
Stratum germinativum or Malpighian layer
Disease assoc with ABSENCE of melanin
Albinism
Disease assoc with DEFICIENCY in melanin
Vitiligo
Amino acid needed to produce melanin, dopamine, epi, norepi and tyroxine
TYROSINE
Tyrosine give rise to : (3 derivatives)
Melanin
DOPA
Tyroxine
DOPA gives rise to
DOPA ➡️ Dopamine ➡️ Norepi ➡️ Epi
Disease assoc with LACK OF DOPAMINE which results to involuntary movements
Parkinson’s Disease
DOC for Parkinson’s Disease
Levadopa (L-Dopa)
Tyroxine gives rise to 2
T3 and T4
Other name for T3
Triiodothyronine
T4 is aka
Thyroxine
Which is more potent T3 or T4?
T3 (tulfo=matapang=more potent)
More numerous but no use T3 or T4?
T4
Epidermal layer where cells are undergoing APOPTOSIS
S. Granulosum
2 granules in S. Granulosum
Keratohyalin granules
Lamellar granules
Granules which converts tonofilaments to keratin
Keratohyalin granules
Granules in S. Granulosum which is a layer of lipid for protection (wag matuyo ang body)
Lamellar granules
Other term for S. Lucidum
Clear cell layer or Translucent layer
S. Lucidum is found in _ skin (3 examples)
Thick skin - Palm, soles, fingertips
Syndrome assoc with PALMOPLANTAR KERATODERMA ( abnormal thickening of Palm and Sole) (“P”)
Papillon- Lefevre Syndrome (“P”)Papillon - Palmo
Dental manifestation of Papillon Lefevre Syndrome
Periodontitis in children (“puppy=child”)
2 diseases assoc with periodontitis in CHILDREN
Papillon Lefevre syndrome (“puppy=child”)
Chediak Higashi Syndrome (“chanak=child”)
Disease assic with CAFE AU LAIT SPOTS and PERIO in Children. (“C”)
Chediak-Higashi Syndrome (“C” - Chediak : Cafe)
Thickest layer of epidermis
Stratum corneum
Other term for S. Corneum
Horny layer
Abnormal thickening of stratum corneum due to constant friction
Callus
Excess keratinocytes shedding from SCALP
Dandruff
“SCALP”
Skin Ct Aponeurosis Loose ct Periosteum
Sheddings from other parts of the body (libag)
Dander
Skin disease where keratinocytes divide and move more quickly than normal
Psoriasis
3 signs and symptoms of Psoriasis
Silvery scales
Monroe’s Abscess
Auspitz sign
Abscess assoc with Psoriasis/ Cardinal sign of psoriasis
Monroe’s abscess
Bleeding spots in Psoriasis
Auspitz sign
Abscess assoc with Osteomyelitis
Brodies abscess
Causative agent of Osteomyelitis
Staphylococcus Aureus
Staphyloccocus aureus which is a common bacteria in the skin which also has 2 charac:
Pus producing
Antibiotic resistant
3 assoc with MOTH EATEN Radiographic Appearance
Ewing’s sarcoma
External Root resorption
Osteomyelitis
Malignant cell tumor with 2 rx app: MOTH EATEN and ONION SKIN
Ewing’s sarcoma
Dermis is made up of what fibers (2)
Collagen and elastic fibers
Provides blood supply for epidermis
Dermis
2 layers of dermis
Papillary layer
Reticular layer
Thinner layer of dermis
Papillary layer
Nipple like projections from dermis towards epidermis
Dermal papillae
Rete pegs aka
Epithelial ridges
Mechanoreceptor in the DERMIS responsible for LIGHT TOUCH sensation
Meissner corpuscles
Nipple like projections from EPIDERMIS to DERMIS (seen in Epidermis)
Rete pegs or epithelial ridges
Other name for Meissner corpuscles
Corpuscles of Touch
Disease assoc with SAW TOOTH LIKE rete pegs
Lichen planus
White lesion common in Buccal mucosa can’t be rubbed off with clinical appearance= “Wickham’s striae”
Lichen planus
White lesion that can be rubbed off
Candiasis
Causative agent of candiasis
Candida albicans
DOC for candidiasis
Nystatin(antifungal)
White lesion= Pre cancerous and cant be rubbed off.
Leukoplakia
White lesion disappears when stretched also assoc with accumulation of fluid.
Leukoedema
Thicker layer of dermis
Reticular layer
Reticular layer is attached to what layer
Subcutaneous layer or hypodermis
MAJOR NUTRIENT SUPPLIER for the skin
Reticular layer of Dermis
Mechanoreceptor found in Papillary layer of dermis
Meissner corpuscles
Mechanoreceptors found in Reticular layer of Dermis
Ruffini’s corpuscle or Bulbous Corpuscle
End bulb of Krause
Mechanoreceptor for HOT (“Ruffa”)
Ruffini’s corpuscles
What cells are in the hypodermis or subcutaneous layer
Adipocytes (shape: signet ring)
Other name for Ruffini’s corpuscles
Bulbous corpuscles
Mechanoreceptor for stretch (“Luffi-one piece”)
Ruffini’s corpuscles
Mechanoreceptor for cold (“Santa Clause-winter”)
End bulb of Krause
Mechanoreceptor for pressure (“pasan nya”) and proprioception
Pacinian corpuscles