The GI tract Flashcards

1
Q

What are organs grouped into?

A

alimentary canal and accessory organs

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2
Q

Alimentary canal

A

a tube from lips to anus

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3
Q

What are the segments of the canal?

A

Mouth, Pharynx, Oesophagus, Stomach, Small intestine, large intestine

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4
Q

What are the three body cavities?

A

Thoracic cavity, Abdominal/ Pelvic cavity, and the body wall enclosing the cavities

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5
Q

What is the Thoracic cavity lined with?

A

lined with endothoracic fascia

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6
Q

Abdominal and pelvic cavity

A

lined with transversalis fascia

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7
Q

Fascia

A

A thin layer of connective tissue that surrounds and holds organs

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8
Q

What is the body wall composed of?

A

skin, double layer of fascia, muscles and inner fascia

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9
Q

What is the serous membrane?

A

lines the abdominal cavity, made up of a layer of simple squamous epithelial cells supported by a layer of connective tissue layer that attaches to an underlying structure

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10
Q

What are the 3 different types of serous membrane

A

Parietal serosa, Visceral serosa and Connecting serosa

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11
Q

Parietal serosa

A

lines the wall of the cavity

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12
Q

Visceral serosa

A

lines the organs

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13
Q

Connecting serosa

A

makes serous fluid (peritoneal fluid), functions to stop adhesions among organs

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14
Q

Peritoneum

A

thin serous membrane, it lines the abdominal and pelvic cavities

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15
Q

Connecting peritoneum

A

connects the visceral and parietal peritoneum

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16
Q

Parietal and visceral peritoneum

A

continuous with each other and connecting peritoneum

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17
Q

Peritoneal pouches

A

excavations of peritoneum into the pelvic cavity

18
Q

Peritoneal cavity in males and females

A

In males it is a completely closed sac, in females it has two small openings (uterine tubes)

19
Q

What are the walls of the peritoneal cavity separated by?

A

thin films of serous fluid, it is only potential space

20
Q

Mesentery Connecting Peritoneum

A

between intestinal and the abdominal wall

21
Q

Ligament connecting peritoneum

A

between visceral and parietal peritoneum

22
Q

Fold connecting peritoneum

A

between two visceral peritoneum

23
Q

Omentum connecting peritoneum

A

between the stomach and abdominal organs/ abdominal wall

24
Q

What are the common layers of the alimentary tract?

A

Tunica mucosa, Tunica submucosa, Tunica muscularis and Tunica serosa

25
Q

Tunica mucosa

A

next to the lumen and protected by a layer of mucus

26
Q

Tunica submucosa

A

Dense connective tissue that may have glands, Meissner’s plexus

27
Q

Tunica muscularis

A

Smooth or skeletal muscle, auerbachs plexus

28
Q

Tunica serosa

A

Loose connective tissue

29
Q

What is the Tunica mucosa split into?

A

Laminae epithelialis mucosa, Lamina Propria, Lamina muscularis mucosae

30
Q

Laminae epithelialis mucosa

A

Surface epithelium , rests on a basal membrane

31
Q

Lamina propria

A

Layer of connective tissue, e.g mucosal glands, blood vessels and lymphoid structures

32
Q

Lamina muscularis mucosae

A

not always present, thin layers of smooth muscle

33
Q

Tunica adventitia

A

serosa if organ is surrounded by other tissues

34
Q

Tunica serosa

A

serosa if organ is suspended in body cavity

35
Q

Mesothelium

A

what covers simple squamous epithelium in the serosa

36
Q

Tunica muscularis in ruminants and dogs

A

entirely skeletal

37
Q

Tunica muscularis in Humans and Chicken

A

entirely smooth muscle

38
Q

Tunica muscularis in Horses and Cats

A

distal third is smooth, the rest is skeletal

39
Q

What are the 3 parts of the oesophagus?

A

Cervical thoracic and abdominal

40
Q

what does the oesophagus penetrate through?

A

penetrates the diaphragm through the oesophageal hiatus