The correct order of structures ingested grass will pass through in a ruminant is:

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In ruminants, the correct order of structures ingested grass will pass through is rumen, reticulum, omasum, and abomasum. The rumen is the first chamber where the grass is broken down by microorganisms, then it moves to the reticulum for further breakdown and the omasum absorbs water, electrolytes, and volatile fatty acids. Finally, the remaining digesta enters the abomasum where it is mixed with gastric secretions for final digestion and absorption. Option B is the correct order.

The Correct Order of Structures Ingested Grass Will Pass Through