faal integumen dms
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blok dms integumen faalTRANSCRIPT
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The Integumentary System
Nurfitri Bustamam, SSi, MKes, MPdKed.
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Learning Objectives
Describe the main structure & function
of the skin.
Describe the accessory function of the
skin.
Summarize the effects of the aging
process on the skin.
Nurfitri Bustamam 2
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Nurfitri Bustamam 3
• Integument = covering
• about 7% of total body
weight (4-5 Kg)
• 1.5 – 2 square meters
in area, 1.5 - 4 mm in
thickness
• Devote a lot of time to
improving the
appearance of the skin
“ beauty is only skin
deep”
• Changes of the
integument may
indicate a dysfunction
in another system
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The Structures of the Integumentary Systems
Nurfitri Bustamam 4
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Struktur:
Kulit: epidermis & dermis
Struktur khusus: rambut, kuku, kelenjar (sebacea, keringat, ceruminous)
Epidermis
◦ Keratinized stratified squamous epithelium
◦ Avascular (nutrisi via difusi)
◦ Terdiri atas sel-sel yg terus berproliferasi, mature, & terdorong ke permukaan kulit. Totally new epidermis 25-45 days
◦ Ada 4 macam sel: keratinocytes yg mensintesis keratin utk memperkuat & membuat epidermis water resistant , melanocyte (pelindung dari sinar UV), sel Langerhans (epidermal dendritic cells) sebagai macrophages & merkel celss (touch receptor)
◦ Stratum: basale/germinativum, spinosum, granulosum (bersifat water proofing krn ada glycolipid), lucidum (tdk ada pada kulit yg tipis, & corneum.
Nurfitri Bustamam 5
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Dermis
◦ Derm = skin
◦ Irregular connective tissue, well supplied with blood vessels, lymphatic vessels & nerves
◦ Cutaneous receptors, glands, hair follicles
◦ Papillary layer & reticular layer
◦ Tattoo using needle to deposit pigment in the dermis
Subkutan/Hypodermis/Superficial fascia
◦ tdd jaringan ikat terutama lemak
◦ fungsi: melekatkan kulit pada jaringan di bawahnya, insulator panas, memungkinkan kulit “mobile” & melindungi dari shock mekanik.
Nurfitri Bustamam 6
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General functions of the skin
Protection of underlying tissues & organs against shock, abration, & chemical attack.
Excretion of salts, water, & organic wastes by integumentary glands.
Maintenance of normal body temperature through either insulation or evaporative cooling.
Synthesis of vitamin D3
Storage of nutrients (lipid)
Detection of touch, pressure, pain, & temperature stimuli (cutaneous sensation)
Blood reservoir (5% of blood volume)
Nurfitri Bustamam 7
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Nurfitri Bustamam 8
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Nurfitri Bustamam 9
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Nurfitri Bustamam 10
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Reseptor Taktil di Permukaan kulit
Nurfitri Bustamam 11
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Pacini: getaran Rufini: rabaan kasar Meissner: ‘fine touch’ (bila rangsang berada di
1receptive fields, maka akan dipersepsikan sebagai 1 titik)
Rambut taktil: pergerakan rambut tubuh deteksi gerakan, kontak pertama obyek ke tubuh (eg. Lokalisasi taktil)
Thermoreseptor (akhir saraf bebas): ◦ TR dingin: 10 – 20º C ◦ TR hangat: 25 - 40º C ◦ Bila kurang dari 10 atau lebih dari 45ºC nosiseptor (reseptor nyeri) ikut terangsang
Nurfitri Bustamam 12
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Receptive Fields
Nurfitri Bustamam 13
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GRACE J-KAHL © 2006
Bila korteks sensorik diberikan
stimulus listrik, maka orang
percobaan akan dapat menyebutkan
bagian tubuh mana yang terstimulasi
timbul gambar homunkulus.
Gambar tubuh homunkulis terdistorsi
bukan tergantung ukuran bagian
tubuh tapi karena banyaknya reseptor
sensorik pada bagian tersebut.
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Homunkulus Sensorik (homunkulus = tuyul)
Menunjukkan penataan somatotonotopis sensorik
Nurfitri Bustamam 15
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Rangsang reseptor saraf sensorik medula spinalis thalamus korteks area somatosensorik (girus post-centralis : HOMONKULUS SENSORIK) korteks asosiasi somatosensorik (lobus parietal : broadmann 5 &7) kesan (persepsi). Lesi pada korteks asosiasi : astereognosis
Nurfitri Bustamam
Rangsang
Persepsi
Traktus
asenden
Medula
spinalis
Reseptor
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Nurfitri Bustamam 17
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1. Saat punggung kita dipijat kita dapat membedakan apakah si pemijat menggunakan air atau minyak. Hal tersebut terjadi karena punggung kita memiliki sensor minyak dan sensor air (Pilih: Benar/Salah)
2. Semua rangsangan pada punggung saat massage diterima oleh ……. (Pilih: sensor/reseptor/konduktor)
3. Rangsang tersebut diteruskan melalui saraf ..... (Pilih: sensorik/ motorik), kemudian diproses di bagian otak yaitu di ..... (Pilih: korteks/ medulla)
Nurfitri Bustamam 19
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Nurfitri Bustamam 20