8 Questions
Which cells make up the outer body wall of a sponge?
Pinacocytes
What is the collagenous substance that provides a supportive matrix under the pinacoderm called?
Mesohyl
What are the perforated openings all around sponges called?
Ostia
What is the name for the central cavity of a sponge?
Spongocoel
Which cells make up the inner epithelial layer of a sponge?
Choanocytes
What is the name for the flagellated cells in sponges that have a collarlike ring in microvilli along the flagellum?
Choanocytes
What is the term for the single external opening of a sponge?
Osculum
What is the name for the needle-like forms within a sponge that act as the skeleton?
Spicules
Test your knowledge of the anatomy of sponges with this quiz! Learn about the pinacoderm, pinacocytes, mesohyl, ostia, choanoderm, and choanocytes. Challenge yourself with questions about the outer body wall, thin flat cells, collagenous substance, perforated openings, inner epithelial layer, and flagellated cells of these fascinating creatures.
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