| 1. | Spermatocytes develop from the transformation of choanocytes and oocytes arise from archeocytes.
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| 2. | The cell body of choanocytes is what is responsible for nutrient absorption.
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| 3. | Most known carnivorous sponges have completely lost the water flow system and choanocytes.
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| 4. | The spongocoel is not lined with choanocytes; these cells are restricted to the flagellated chambers.
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| 5. | The body structure is characterized by a stalk-like spongocoel surrounded by a single layer of choanocytes.
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| 6. | However, genetic studies and some morphological characteristics, like the common presence of choanocytes, support a common origin.
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| 7. | Cells with yellow granules are present in the mesohyl, as are embryos, which are always found near choanocytes.
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| 8. | The inner pockets of the pleats are lined with choanocytes, which connect to the outer pockets of the pleats by ostia.
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| 9. | The most notable cell types of sponges are the goblet-shaped cells called choanocytes, so named for their similarity to choanoflagellates.
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| 10. | This increase in the number of choanocytes and hence in pumping capacity enables syconoid sponges to grow up to a few centimeters in diameter.
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