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glands are classified according to their...
- structure
- function based structure
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structure of glands includes...
- Unicellular—glands are scattered in the epithelial tissue
- multicellular-forms multi cellular lined pouches in the epithelial tissue
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function based structure includes...
- Exocrine –with ducts..typically flow onto the free surface of the covering epithelium, using tube like duct.
- Endocrine Glands—without ducts
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what are ex. of exocrine glands and their secretions..
- *sweat, skin oil, ear wax & digestive enzymes
- * mammary gland- milk
- * Sudoriferous (sweat glands)- perspiration
- *sebaceous gland-oil
- * salivary glands- secretes mucus and digestive enzymes.
- * Lacrimal gland-tears
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what are the types if secretions..
- Serous glands-produce thin, watery secretions such as sweat, milk, tears and digestive juices
- Mucous glands- produce mucin that absorbs water to form a sticky secretion called mucus
- Mixed glands contain which contain both cell types
- Cytogenic glands-release whole cells such as sperm and egg cells
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3 types a gland can be..
- holocrine
- merocrine
- apocrine
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branched acinar glands rupture and disintegrate (dies) to deliver their accumulated secretory product. They are then replaced.
holocrine gland
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Sebacous (oil-producing) glands of the scalp
holocrince gland
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release their product by exocytosis through simple coiled tubular glands
Merocrine glands
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Non odorous (order less) body sweat glands,tears, gastric glands, saliva pancreas, etc.
most are exocrine glands
merocrine
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secrete parts of the apical surface with the secretion.... mixture of sweat and oil.. the tip of the cell bursts
apocrine glands
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simple tubular odorous armpit sweat glands
smelly armpits and smelly pussy/dick
Compund Acinar mammary glands
Apocrine glands
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usually compact, multicellular secretion flow directly from the cell to the extracellular fluid and which then diffuses into the blood stream without ducts
endocrine glands
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are called hormones
Endocrine secretions
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endocrine glands are, pituitary, thyroid, parathyroid, adrenal, pineal are all examples of what gland ?
endocrine gland!
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