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Ruminants 1 (Rumination (Newly swallowed into dorsal sac, replaced by…
Ruminants 1
Rumination
Newly swallowed into dorsal sac, replaced by partial fermented
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Reverse peristaltic oesophageal contractions move material to oral cavity - liquid immediately re-swallowed
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Omasum
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Multiple leaves with papillae, increase surface area
Eructation
Primary contractions occur as normal, caudo-dorsal blind sac contracts forward displacing contents into relaxed cranial blind sac and ventral sac
Dorsal sac continues contracting, moves gas to oesophageal opening. Some gas escapes via mouth
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Reticulum/rumen
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Rumen
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Papillae; absorption of water, VFAs, ions, increase surface area
Neural plexuses - Regulate contraction via short reflexes, modulated by long (vagus) reflexes
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