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22 Cards in this Set
- Front
- Back
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What are glands?
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Epithelial cells specialised for secretion
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What are exocrine glands?
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Glands that secrete into ducts on an epithelial surface
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What are endocrine glands?
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Glands that secrete into blood or lymph
(ductless) |
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What are the 2 main types of multicellular exocrine glands?
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Simple and compound
(Depends on if duct is branched) |
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What are the 5 types of simple glands?
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Simple tubular
Simple coiled tubular Simple branched tubular Simple acinar Simple branched acinar |
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What are the 3 types of compound glands?
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Compound branched tubular
Compound acinar Compound tubuloacinar |
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Describe simple tubular glands
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Straight tube that opens directly onto epithelial surface.
Found in intestinal mucosa |
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Describe simple coiled tubular glands
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Coiled tubular unit, unbranched duct.
Sweat glands of skin |
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Describe simple branched tubular glands
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Branched tubular secretory portions, unbranched duct
Mucus producing ppyloric region of stomach |
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Describe simple acinar glands
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Small pocket in epithelial surface
Found in mucus secreting glands of penile urethra |
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Describe simple branched acinar glands
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Several acini empty into one duct
Found in sebaceous glands of hair follicle |
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Describe compound branched tubular glands
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Branched tubular units, branched ducts
Found in duodenum |
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Describe compound acinar glands
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Branched acini empty into branched ducts
Found in pancreas (exocrine part) |
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Describe compound tubuloacinar glands
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Acinar part - serous secretions
Tubular part - mucus secretions Found in mixed salivary glands (mandibular) |
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What are the 3 mechanisms of secretions?
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Merocrine
Apocrine Holocrine |
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Describe merocrine secretions
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Exocytosis - fusion of vesicle and cell membrane, release of products
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Describe apocrine secretions
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Membrane-bound vesicles released
e.g. mammary glands |
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Describe holocrine secretions
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Release of whole cell with subsequent disintegration of cells causing release of secretory products
e.g. sebaceous glands of skin |
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What are the 3 types of secretions?
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Mucous, serous, sebaceous
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Describe mucous secretions
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Contains mucins, antiseptic enzymes, immunoglobulins, proteins and salts.
Protection and lubrication |
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Describe serous secretions
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Rich in water and enzymes
Lubrication and digestion |
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Describe sebaceous secretions
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Contains triglycerides, fatty acids, wax, lipids.
Waterproofing, antimicrobial |
