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Flashcards in Internal Surfaces Of The Body Deck (7)
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Describe mucous membranes

Line internal tubes that open to the exterior e.g. Alimentary, respiratory, urinary
Consist of: epithelium lining the tube
Adjacent layer of connective tissue
In alimentary tract 3rd layer of smooth muscle

1

Describe serous membranes

Thin, two part membrane that lines closed body cavities
E.g. Peritoneum (abdominal organs), pleural (lungs), pericardial (heart)
Secrete lubricating fluid that promotes friction free movement of structures
Consists of: mesothelium(simple squamous) that secretes lubricating fluid
Thin layer of connective tissue that attaches epithelium to adjacent tissues

2

Describe the structure of the alimentary tract

Mucosa
Submucosa
External muscle layer
Serosa

3

Describe structure of oesphagus

Mucosa- simple squamous non keratinised, lamina propria, muscularis mucosae
Submucosa - subtending layer of connective tissue and mucous secreting glands
Muscularis externa - smooth muscle kayers - peristalsis
Adventia - this outermost layer of connective tissue

4

How is structure of GI mucosae related to its function?

Muscularis externa - smooth muscle contracts to move food by peristalsis

5

How is structure of Urinary mucosae related to its function?

Can distend to accomodate urine
Epithelium has tight junctions - impermeable

6

How is structure of respiratory. mucosae related to its function?

Hyaline cartilage wall for support
Alepveoli have lots of capillaries for gaseous exchange