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Online Journal of Veterinary Research©
Volume 23 (9):873-889, 2019.
Postnatal developmental morphology of rumen in goats (Capra hircus).
Khudair A Hussein and Hadaf H Mohamed.
Department of Anatomy, College of Veterinary Medicine, University of Baghdad, Iraq.
Hussein KA, Mohamed HH., Postnatal developmental morphology of rumen in goats (Capra hircus), Onl J Vet Res., (9):873-889, 2019. We recorded development and histo-morphological micrometrics in rumens of groups of 5 goats (Capra hircus) each 1 to 10 day neonates, 11-60 day old weaners and > 60 day adults. Mean rumen/body weight ratios were 0.015 in neonates, 10.2 in weaners and 9.8 in adults, volumes 62, 2620 and 15400ml, length 3.3, 18.8 and 27.8cm, and rumen width 2.5, 6,6 and 23.6cm, respectively. Papillae measured ~750 microns (m) in weaners and 1875m in adults, but in neonates was not measurable. Keratin layers were 50m thick in weaners and 170m in adults with none in neonates. However, epithelium width in neonates 220m was similar to adults 250m. In neonates, microscopy revealed immature stratified cuboidal squamous epithelial cells with small conical papillae increasing rapidly in size in weaners by day 11. The width of all epithelial layers decreased with age except for stratum corneum. Keratin appeared in weaners and increased to adulthood. In adults the ventral blind sac extended more caudally than the dorsal blind sac and longitudinal pillars did not join with posterior ones.
Key words: Rumen, Goat, development, morphometrics.