Questions and Answers
What are choanocytes?
Collar cells that line the body cavity and have flagella that circulate water in sponges
What does the ectoderm produce?
Sense organs, nerves, and outer layer of skin
What is an amoebocyte?
A specialized cell that crawls about and delivers nutrients from the choanocytes to the rest of the body cells
The large opening on a sponge through which filtered water is expelled is called the ______.
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What is a spicule?
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The small pores on a sponge through which water enters are called ______.
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Study Notes
Key Sponge Biology Terms
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Choanocytes: Specialized collar cells lining the sponge's body cavity; their flagella create water currents that facilitate feeding and respiration.
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Ectoderm: The outermost germ layer in sponge development; responsible for forming sense organs, nerves, and the outer skin layer.
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Amoebocyte: Mobile cells within the sponge's body wall; their function includes nutrient transport from choanocytes to other sponge cells, playing an essential role in the sponge's physiology.
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Ostia/Pore: Small openings on the sponge's surface that allow water to enter; critical for the sponge’s feeding and waste removal processes.
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Spicule: Structural elements found in the skeletons of certain sponges; composed of silica or calcium carbonate, providing support and protection.
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Osculum: A prominent opening at the top of the sponge; serves as the exit point for water after it has been filtered, facilitating the expulsion of waste and excess water.
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Description
Test your knowledge on the anatomy and cell types of sponges with this quiz. You'll explore key terms like choanocytes, ectoderm, and amoebocytes. Perfect for understanding the foundational biology of these fascinating organisms.
