Multiple choice

Which of the following is used to capture food in sponges?

  1. Porocytes

  2. Pinacocytes

  3. Choanocytes

  4. Trophocytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Choanocytes (or collar cells) are the feeding cells in sponges. Each choanocyte has a flagellum surrounded by a microvillar collar that creates water currents and traps food particles (bacteria, organic debris) which are then ingested by phagocytosis. Porocytes are pore cells, pinacocytes are covering cells, and trophocytes are nutritive cells in other animals.

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