Integumentary System p. 53-57
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Integument | skin, nails, hair, sweat glands, all of the structures we find in the dermis
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| Dermatology | study of skin
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| Epidermis | epithelial layer- stratified squamous epithelium
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| Dermis | layer where we find connective tissue & many other structures; inner layer of the skin
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| Subcutaneous Layer | beneath the skin, adipose tissue found here
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| Keratin | wax-like protein, fills the dead cells in the epidermis, also in nails and hair
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| Melanin | pigment in our skin, made by cells called melanocytes, UV light causes and increase in production of melanin, purpose is to protect dermis from UV light
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| Melanocytes | produce melanin, all humans have approximately the same number, the difference is how much melanin the make; found near the basement membrane
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| Stratum Basale | bottom/base layer; cuboidal cells that are dividing are found here, also melanocytes; function is to replace cells that are being lost
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| Stratum Corneum | outer layer; find dead squamous cells that are filled with keratin; function to protect from friction, barrier- keeps out infection and keeps in moisture (water)
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| Papillae | ridges at top of dermis, used for grip; mostly on our hands and feet, visible on our skin
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| Receptors | detect changes in the dermis; sensitive to change, touch, thermal
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| Connective Tissue | mostly collagen with a little elastin; function is strength & stretch
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| Blood Vessels | function: transport nutrients, pick up waste, distribute heat, help control body temperature
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| Nerves & Receptors | function: detect changes, send information about those changes to the central nervous system (brain & spine)
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| Sebaceous Glands | always connected to a follicle; make sebum, keep moisture in
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| Sudoriferous Glands | sweat glands
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| Apocrine Glands | armpits & groin; respond to stress/excitement; go all the way down into the subcutaneous layer; contains oils that give sweat odor; form of communication
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| Eccrine Glands | respond to temperature; sweat is mostly water with a little bit of salts; helps cool us
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| Pacinian Corpuscles | larger & deeper; pressure sensors on the skin; found on internal organs as well as tendons & ligaments
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| Meissner Corpuscles | closer to the surface; sensitive to a lighter touch; help us to feel texture
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| Arrector Pili Muscles | attached to the base of hair follicles; communication, insulation-control body temperature
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| The Subcutaneous Layer | adipose tissue for insulation, cushion & storage
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| Hair Follicles | used as pores for sebaceous & apocrine glands, grow hair (sometimes)
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