BIOM3002 Lecture Notes - Lecture 3: Exocrine Gland, Tunica Externa, Lamina Propria
26 May 2018
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HISTOLOGY LECTURE THREE
Epithelial tissue – exocrine glands:
• Single –cell gland: goblet cells [mucous secreting]
• Simple = unbranched ducts
• Compound = branched ducts
• Tubular = cylindrical secretory part
• Acinar = round secretory part
• Coiled secretory part
• Branched secretory part
Secretion:
• Serous [fluid; water-like]
• Mucous [e.g. salivary structures and respiratory system]
• Mixed [seromucous]
Eccrine/mesocrine e.g. sweat glands skin
Holocrine e.g. sebaceous oil glands
Apocrine [special sweat glands and breast; e.g. body odour]
Myoepithelial cells: contractile cells around outside
of gland
Mucous membranes:
• Mucosa [oral cavity = 1st mucosa]
• Lines cavities of body that connect with outside
[pathogens]
• Consists of: epithelium and basement membrane [with or
without glands] and lamina propria [supporting CT] [hosts
immune cells]
Serous membranes:
• Lines internal cavities of the body
• Consists of mesothelium [epithelium] and basement membrane
[no glands] and CT
Adventitia:
• Tunica adventitia, tunica externa [the outermost layer CT
around a structure; connects to surrounding structures]
A) elements that drive/support respiration: musculoskeletal;
nervous
B) Elements that conduct and condition
C) Elements that permit gaseous exchange
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Document Summary
Epithelial tissue exocrine glands: single cell gland: goblet cells [mucous secreting, simple = unbranched ducts, compound = branched ducts, tubular = cylindrical secretory part, acinar = round secretory part, coiled secretory part, branched secretory part. Secretion: serous [fluid; water-like, mucous [e. g. salivary structures and respiratory system, mixed [seromucous] Apocrine [special sweat glands and breast; e. g. body odour] Myoepithelial cells: contractile cells around outside of gland. Mucous membranes: mucosa [oral cavity = 1st mucosa, lines cavities of body that connect with outside. [pathogens: consists of: epithelium and basement membrane [with or without glands] and lamina propria [supporting ct] [hosts immune cells] Serous membranes: lines internal cavities of the body, consists of mesothelium [epithelium] and basement membrane. Adventitia: tunica adventitia, tunica externa [the outermost layer ct around a structure; connects to surrounding structures, elements that drive/support respiration: musculoskeletal; nervous, elements that conduct and condition, elements that permit gaseous exchange.
