skin
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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| The skin: | Covers the entire body, largest organ of the body, thickness of 1.5-4 mm
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| Skin consists of | Epidermis, dermis, hypodermis
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| epidermis | superficial region consisting of stratified squamous epithelium tissue
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| dermis | underline epidermis and consists of dense irregular connective tissue, strong flexible connective tissue, contains nerves and blood vessels, hair follicles and glands
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| Hypodermis | Subcutaneous layer deep to skin, not part the skin but share some functions, mostly adipose tissue the acts as shock absorber and insulator
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| kertionocytes | Tightly connected by desmosomes, arise from stratum basal (deepest layer of the epidermis), become scale like and die, death of cells occur from lack of blood
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| Melanocytes | Synthesis melanin which protect the nuclear's from UV rays and shelters DNA, these cells are found in stratum basal, spider like
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| Langerhan's cells | they are macrophages, they help to activate your immune system
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| Merkel cells | Present in small numbers at the dermal-epidermal junction, immediately associated with the sensory nerves
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| Layers of the epidermis are (5): | Stratum basale, stratum spinsum, stratum granulosum, stratum lucidum, stratum corneum
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| Stratum Basale | Deepest epidermal layer also called germinitavum because of rapid cell growth, Single row of young keratinocytes
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| Stratum Spinosum (pricky layer) | Several layers thick, cells contain web-like System of intermediate prekeratin filaments attached to desmosomes.
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| Stratum Granulosum (granular layer) | 4-6 layers ( thin ), sell appearance is flattened
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| Stratum Lucidum (clear layer) | Only in thick skin, thin, translucent band, a few rows of flat dead keratinocytes. This is only present on thick skin
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| Stratum Corneum (horny layer) | 20 to 30 rows of dead, flat, enucleate keratinized membrane sacs, though dead- cells still have functions
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| How many cells do we shed every minute | 50,000
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Created by:
carolinegurnsey
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