Digestive System

 


 

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Plate

Figure

Slide

Comments
A. Oral Cavity
1. Lips

71

1-6

66
Lip, human; H&E. The lips are composed of striated muscle covered on the outside by skin and on the inside by the mucous membrane of the mouth. The skin portion consists of stratified squamous epithelium which is cornified at the surface and which rests on a layer of connective tissue containing sweat glands, hair follicles and sebaceous glands. In the transition region between the skin and the oral mucosa the hair follicles and glands disappear and the epithelium becomes penetrated by tall papillae of connective tissue. It is the blood vessels of these papillae that give the lips their red color. On the oral surface the papillae become shorter and the cornifying (keratinizing) epithelium gives way to a mucosa, consisting of a nonkeratinizing stratified squamous epithelium, supported by a layer of connective tissue, called the tunica propria (lamina propria). The latter blends in with the areolar connective tissue of the underlying submucosa, in which are found the seromucous labial glands.
2. Tongue

64

1,2
69
71
Tongue, human; H&E. Identify the filiform papillae.

65

1
68
69
Tongue, rabbit; iron hematoxylin. Note the striated muscle and foliate papillae.

65

2

70
Tongue, circumvallate papillae; H&E.
3. Soft palate

69

1-3

67
Soft palate, vert. sect; H&E.
4. Salivary glands

66

1,2
73
74
supp.
Submaxillary (submandibular) gland; Iron Hematoxylin and Aniline Blue or H&E.

68

1,2

72
Sublingual gland; Iron Hematoxylin and Eosin.

67

1,2

75
Parotid gland; H&E.
5. Teeth

70

1-4

16
Membrane bone formation. Rat embryo head, frontal skeleton; Mallory's Triple Stain.
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Plate

Figure

Slide

Comments
B. Esophagus
1. Upper

72

1,2

77

supp.

supp.

Esophagus, upper; H&E.
2. Middle

72

1,2

78
Esophagus, middle; H&E.
3. Lower

73

1

79
Esophagus and Stomach; H&E.
C. Stomach
1. Cardiac region

73

1-4

79
Esophagus and Stomach; Stomach, cardiac; H&E.
2. Fundic region

74,75

all
80
81
83
Stomach, cardiac; stomach, fundus; H&E.
3. Pyloric region
76
1-3
82
83
84
85
All H&E.
4. Muscularis externa and Auerbach's plexus

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-
supp.
Plastic section; H&E.
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Plate

Figure

Slide

Comments
D. Small Intestine
1. Duodenum

76

1-3

85
Stomach and duodenum; H&E.

77

1,2

86

87

99
Duodenum; H&E.
2. Jejunum

78

1-3
88
89
Jejunum; H&E.
3. Ileum

79

1-3
90

137

supp.

supp.

Ileum; H&E.
E. Large Intestine
1. Appendix

81

1,2

91
Appendix; H&E.
2. Colon

80

1-4

92a

92b

Colon, mammal; H&E.

93
Colon, human; H&E.
3. Anorectal junction

82

1-3

94
Anal canal, monkey; H&E
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Plate

Figure

Slide

Comments
F. Liver

83,84

1,2

95
Liver, pig; azocarmine and aniline blue. The connective tissue septa, which are stained blue, clearly delineate the lobules with a central vein in the center and portal canals at the "corners."

-

-

97a

97b

Liver, bile canaliculi; silver stained. The silver deposits reveal the location of the bile capillaries (canaliculi) between the hepatocytes. Compare with slide 95 which is stained with H&E.

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-

96a

96b

Liver, phagocytosis; H&E and carbon. To prepare this slide, livers were injected with carbon particles in vivo prior to fixation. The sections were then later stained with H&E.

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-

132
Liver, Human; H&E. Connective tissue septa are absent, but the lobules can still be delineated.
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-
Liver; H&E; plastic section
G. Gall Bladder

86

1-4

98
Gall bladder; H&E.
H. Pancreas

87

1,2

99a

99b

100
Pancreas; H&E.

-

-

101
Pancreas; Iron Hematoxylin.

-

-

102
Pancreas; Golgi silver stain; H&E.

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-

103
Pancreas; Iron Hematoxylin and eosin.
   
104
Pancreas; injected to reveal vasculature.

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-

supp.
Pancreas; plastic section.

 

 




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