The Integumentary System
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| What is the hypodermis? | show 🗑
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| What does the hypodermis do? | show 🗑
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| What is the epidermis? | show 🗑
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| show | most epidermal cells are keratinocytes. produce keratin.
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| show | the fibrous protein that helps give the epidermis its protective properties.
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| What is a callus? | show 🗑
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| What are melanocytes? | show 🗑
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| show | the melanin granules accumulate on the superficial or "sunny" side of the keratinocyte nucleus, forming a pigment shield that protects the nucleus from the damaging effects of UV radiation in sunlight.
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| show | the ingest foreign substances and are key activators of our immune system. their slender processes extend among the surrounding keratinocytes, forming a more or less continuous network.
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| What is thermoregulation? | show 🗑
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| What are the two major components of the integumentary system? | show 🗑
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| What are some functions of the integumentary system? | show 🗑
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| What is thermoregulation? | show 🗑
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| show | the skin. it is made up of different tissues joined to perform specific functions.
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| What are langerhans cells? | show 🗑
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| show | They are located in the deepest layer of the epidermis. -they contact the flattened process of a sensory neuron.
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| show | deepest layer of epidermis.-forms the epidermal ridges which extend into the dermis and are adjacent to the dermal papillae which extend into the epidermis.
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| show | single row of cubodial or columnar keratinocytes. they are the youngest keratinocytes. nuclei are large in this layer. melanocytes and tactile cells are also found here.
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| What is the stratum spinosum? | show 🗑
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| What cells are found in the stratum spinosum? | show 🗑
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| show | middle layer. the granular layer. 3 to 5 layers of flattened keratinocytes that are undergoing apoptosis. the nuclei of these celss begin to degenerate and eventually die.
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| What are keratohyalin granules? | show 🗑
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| What are lamellar granules? | show 🗑
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| show | it is a water repellent sealant that retards loss of body fluids and entry of foreign materials.
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| What is the stratum lucidum? | show 🗑
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| What cells are in the stratum lucidum? | show 🗑
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| show | 25 to 30 layers of dead, flatted keratinocytes. the horny layer. these cells are continuously shed and replaced by cells from deeper stratum. water resistant but not waterproof.
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| show | 2nd deepest layer. The prickly layer. 8 to 10 layers of polyhedral keratinocytes bound together by desmosomes.
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| show | cells in the more superficial portions of this layer become flattened as they produce more and more keratin filaments.
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| What is the stratum granulosum? | show 🗑
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| What are keratohyalin granules? | show 🗑
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| What are lamellar granules? | show 🗑
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| What do the lipid rich secretions of lamellar granules do? | show 🗑
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| What is the stratum lucidum? | show 🗑
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| show | 3 to 5 layers of clear, flat, keratinocytes without a nucleus or organelles filled with eleidin(an intermediate in the synthesis of keratin).
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| show | 25 to 30 layers of dead, flatted keratinocytes. the horny layer. these cells are continuously shed and replaced by cells from deeper stratum. water resistant but not waterproof.
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| show | the active form of vitamin D which is required for normal absorption of calcium and phosphorus by the small intestine.
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| show | deeper, thicker layer made-up of connective tissue containing collagen and elastic fibers.
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| show | fibroblasts, macrophages, adipocytes.
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| What is the papillary layer? | show 🗑
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