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Flashcards in Tissues of the Body Deck (10)
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Gland

Epithelial cell or collection of cells specialised for secretion

1

Exocrine

Glands with ducts

2

Endocrine

Ductless glands
Secrete into the blood stream

3

How to classify glads
Four methods

Destination of secretion
Structure of gland
Nature of secretion
Method of secretion

4

Destination

Exocrine -- ducts to epithelial tissue

Endocrine -- into blood stream

5

Structure of gland

1 -- secretory part
---- unicellular or multicellular
---- acinar (grape shape) or tubular
---- coiled or branched

2 -- duct system
--- simple gland (single duct)
---- complex gland (branched duct)

Branching ducts
Main > interlobular > intralobular > intercalary

6

Nature of secretion

1 -- mucous glands
--- secrete mucus
--- rich in mucins
--- stain poorly

2 -- serous glands
--- secrete watery enzymes
-- eosinphillic (pink)

7

Method of secretion

Merocrine
Apocrine
Holocrine

8

Merocrine

Basically exocytosis
1- membrane bound component approaches cell surface
2- fuses with plasma membrane
3- contents and in continuity with extra cellular space
4- membrane is achieved to maintain surface area

9

Apocrine

Has to get membrane from the plasma membrane
1- non-membrane bound structure approaches cell surface
2- makes contact and pushes up apical membrane
3- thin layer of apical cytoplasm drapes around droplet
4- membrane pinches off from cell
5- membrane replaced from cell