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OJVRTM
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.
ABSTRACT
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.
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