contents of the abdomen Flashcards

1
Q

what are the 6 processes involved in the digestive system?

A
  • ingestion
  • secretion of digestive fluids
  • mixing and propulsion
  • digestion
  • absorption
  • defecation
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2
Q

what is the serous layer?

A
  • outer membrane
  • encloses several body cavities
  • secrete a lubricating fluid
  • outer epithelial layer (secretory) and inner layer (connective tissue with layers)
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3
Q

what is the muscular layer?

A
  • longitudinal or circular

- responsible for movement of lumen contents

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4
Q

what is the mucosal layer?

A
  • inner layer
  • lines internal organs or cavities exposed to external environment
  • secrete mucus
  • involved in absorption
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5
Q

what are the GI tract divisions?

A
  • oral cavity
  • pharynx
  • oesophagus
  • diaphragm
  • stomach
  • small intestine (duodenum, jejunum, ileum)
  • large intestine (colon)
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6
Q

what is the function of the teeth?

A
  • accessory organs

- assist mechanical digestion

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7
Q

what is the function of the palate?

A
  • roof of mouth

- soft palate blocks nasal cavity during swallowing

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8
Q

what is the function of the tongue?

A
  • accessory organ
  • taste
  • assist mixing
  • swallowing
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9
Q

what is the function of the salivary glands?

A

secretion of saliva

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10
Q

what is the function of the pharynx?

A
  • directs food to oesophagus

- blocks entry to trachea

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11
Q

what are the key characteristics of the oesophagus?

A
  • muscular tube around 25cm long
  • posterior to trachea
  • upper edge: pharynx
  • pierces of diaphragm
  • opens to stomach
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12
Q

what are the key characteristics of stomach anatomy?

A
  • most dilated part of alimentary canal
  • between oesophagus and small intestine
  • J shaped; lies under diaphragm and under heart
  • 2 openings, curvatures, surfaces
  • mechanical and chemical digestion
  • lesser and greater curvatures
  • pyloric and cardiac sphincters
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13
Q

what does the cardiac orifice link the stomach to?

A

links stomach to oesophagus

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14
Q

what does the pyloric orifice link the stomach to?

A

links stomach to small intestine

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15
Q

what are the 3 layers of muscle in the stomach?

A
  • longitudinal
  • circular
  • oblique
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16
Q

what are the 3 divisions of the small intestine?

A
  • duodenum
  • jejunum
  • ileum
17
Q

what are the key characteristics of the small intestine?

A
  • convoluted tube
  • pylorus of stomach to ileocaecal junction
  • 5 metres in length
  • where digestions and absorption take place
18
Q

what are the key characteristics of the duodenum?

A
  • around 20-25cm
  • retroperitoneal
  • C shaped
  • where the duct from the pancreas and gall bladder open
  • ends at the duodenal: jejunal flexure
19
Q

what are the 4 parts of the duodenum?

A
  • superior
  • descending
  • horizontal
  • ascending
20
Q

what are the key characteristics for the jejunum/ileum?

A
  • fasting (empty in death)
  • at least 3cm long from duodenal - jejunal flexure to ileocaecal junction
  • site of absorption: large surface area, further increased by circular folds, villi and microvilli, motility
  • motility: one attached and one free edge
21
Q

what are the key characteristics of the large intestine?

A
  • terminal division of the GI tract: from end ilium to anus
  • 1.5m length: cross section compared to small
  • ascending/descending parts are retroperitoneal
  • absorption of water, from faeces and expelling these (defecating)
  • rectum/anus: sphincters close outside world except when defecating
22
Q

what are the 4 parts (right to left) of the large intestine?

A
  • ascending
  • transverse
  • descending
  • sigmoid
23
Q

what are the branches of the superior mesenteric?

A
  • distal part of duodenum to proximal 2/3 transverse colon
  • jejunal and ill branches
  • middle colic
  • right colic
  • ileocaecal
24
Q

what are the branches of the inferior mesenteric?

A
  • distal 1/3 transverse colon to half way down anal canal
  • left colic
  • sigmoid
  • superior rectal
25
Q

what are the gut associated glands?

A
  • liver
  • spleen
  • gall bladder
  • pancreas