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Ontogenesis of Rectum in Local Awassi Sheep Fetuses (Ovis aris) During Prenatal Periods

Ontogenesis of Rectum in Local Awassi Sheep Fetuses (Ovis aris) During Prenatal Periods

Ali Mobder Niyf*, Jafar Ghazi Abbas Al-Jebori 

College of Veterinary Medicine, Al-Qassim Green University, 51013 Babylon, Iraq

*Correspondence | Ali Mobder Niyf, College of Veterinary Medicine, Al-Qassim Green University, 51013 Babylon, Iraq; Email: [email protected] 

Figure 1

Photograph of sheep fetus using vernier caliper to measure the crown rump length to detect the age of fetus. 

Figure 2

Cross section of rectum at (50-55) days of gestation showing: Epitheliallayer (E), lumen (L), mesenchymallayer (M), tunicamuscularis (T) and serosa (S). (H and E stain, 4X). 

Figure 3

Cross section of rectum at (50-55) days of gestation showing: Epithelial layer (E) stratified columnar cells, Goblet cells (G). (PAS combined Alician blue stain, 10X). 

Figure 4

Cross section of rectum at (50-55) days of gestation showing: Undifferentiated mesenchymal layer (M), lumen of rectum (L). (trichrome Masson’s stain, 10X). 

Figure 5

Cross section of rectum at (50-55) days of gestation showing: Inner layer of tunica muscularis (T1), outer layer of tunica muscularis (T2), blood vessels (B).(mason’s trichrome stain, 4X). 

Figure 6

Photograph showing the rectum location in pelvic cavity below the descending colon (D) which extend between left (L) and right (R) kidneys medio- caudally. at 70-75 days of gestation in sheep fetuses. 

Figure 7

Cross section of rectum at (70-75) days of gestation showing: Tunica mucosa (M), tunica submucosa (B), tunica muscularis (T) and serosa or adventitia (S) (H and E stain, 10X). 

Figure 8

Cross section of rectum at (70-75) days of gestation showing: Simple columnar epithelial cells (E) on the apex of villi, stratified epithelial cells on base of villi (E2) and goblet cells (G). (PAS combined Alician blue stain, 10X). 

Figure 9

Cross section of rectum at (70-75) days of gestation showing: Rectal villi (V), long villi (V1), middle villi (V2), short villi (V3) and goblet cells (G), (PAS stain, 10X). 

Figure 10

Cross section of rectum at (70-75) days of gestation showing: Lamina propria (LP), lamina muscularis (LM), tunica submucosa, and inner layer (T1), outer layer (T2) of tunica muscularis. (Trichrome massons stain, 10X).
 

Figure 11

Cross section of rectum at (70-75) days of gestation showing: Tunica serosa (adventitia) (S), blood vessels (B) (H and E satin, 4X). 

Figure 12

Photograph showing the rectum (A), descending colon (B) and right kidney (C) at 100-105 days of gestation in sheep fetuses. 

Figure 13

cross section of rectum at (100-105) days (right) and (130-140) days (left) showing: Tunica mucosa (M), tunica submucosa (B), tunica muscularis (T) and tunica serosa (adventitia) (S), (H and E stain,10X). 

Figure 14

Cross section of rectum at (100-105) days (left) and (130-140) days (right) showing: Simple columnar epithelial cells (E) and goblet cells(G). (PAS combined Alician blue, 10X). 

Figure 15

Cross section of rectum at (100-105) days (left) and (130-140) days (right) showing: Rectal glands (RG), lamina propria (LP), lamina muscularis (LM), tunica submucosa (B) and tunica muscularis (T). (PAS combined Alician blue, 40X). 

Figure 16

Cross section of rectum at (130-140) days showing: Lamina muscularis (LM) and lamina propria (LP) (H and E stain, 10X). 

Figure 17

Cross section of rectum at (130-140) days (right) and (100-105) days (left) showing: Tunica submucosa (B) and collagen connectival tissue fibers (C), (Trichrome massons stain, 10X). 

Figure 18

Cross section of rectum at (130-140) days (right) and (100-105) days (left) showing: Inner circular layer of tunica muscularis (T1), outer longitudinal layer of tunica muscularis (T2), separated by layer of connective tissue (CT), (trichrome massons stain, 10X). 

Figure 19

Cross section of rectum at (130-140) days (left) and (100-105) days (right) showing: tunica serosa (adventitia) (S), blood vessels (V) and aggregation of lymphatic tissue (G), (H and E stain, 10X).  

Journal of Animal Health and Production

November

Vol. 12, Sp. Iss. 1

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