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Mastax

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The mastax is a muscular pharynx found in rotifers. It contains complex structures used for grasping and grinding food particles.

5 Must Know Facts For Your Next Test

  1. The mastax is unique to rotifers and plays a key role in their feeding mechanism.
  2. It consists of hardened, jaw-like structures known as trophi.
  3. Different species of rotifers have different types of trophi, adapted to their specific diets.
  4. The mastax can be used to identify species due to its specialized morphology.
  5. It functions by rhythmic contractions that help break down food before it enters the digestive tract.

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