| Water containing minute food particles is admitted through the incurrent siphon into the pharyngeal basket. |
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| The basic body form of sponges consists of numerous small incurrent canals called ostia and one or more large excurrent opening called oscula. |
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| The siphons are completely fused with an internal septum between the incurrent siphon and the excurrent siphon. |
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| A separate experiment revealed that the area of the incurrent naris where dye entered the rosette determined where it would exit the excurrent naris. |
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| The residual difference of CHF 2.0 million is accounted for mainly by changes in accounts payable and deferrals incurrent during the year. |
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| Concurrent with this, the entire pectinirhomb becomes greatly protuberant along a large, thinwalled ridge spanning the incurrent and excurrent half rhombs. |
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| Most modern bivalves are suspension feeders, and particles suspended in the water column are drawn in through the incurrent siphon by the action of the gill cillia in all but a few species. |
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| Below it is the more fleshy languette or curtain valve which closes the incurrent siphonal opening when required. |
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| The predatory bivalves of the subclass Anomalodesmata have an incurrent siphon that can be everted rapidly to form a capacious hood beneath which small crustaceans are trapped and brought into the mantle cavity. |
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| Water is drawn through the incurrent siphon into the infrabranchial chamber, filtered through the gills into the suprabranchial chamber and is expelled through the excurrent siphon. |
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| Sperm is released by the male directly into the water and enters the female via the incurrent siphon. |
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