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CliffBaxter
1 year ago

Hello,

a host cell 🙂 The cells have a scourge. These are long moving cell progressions, such as small whips that generate a liquid flow. If you look at such a collar chisel cell once:

Collar cell

Image: http://www.trichoplax.com/student-2018/Jakob-Lecture-3-Porifera-1.pdf

then she also has a collar next to the movable chisel. In addition to producing a water stream, the cells can also filter and absorb food particles.

In sponges, the collar chisel cells, also called choanocytes, dress the inner wall of cavities in the sponge:

Composite of collar chisel cells (choanocytes) lined cavity

Image: http://www.trichoplax.com/student-2018/Jakob-Lecture-3-Porifera-1.pdf

They can generate a rainy water flow in their channel system. The water that has been introduced thus serves to breathe and diet and, after it has flowed through chambers, leaves the sponge over an executing opening, so that indigesible food components are also disposed of with the emerging water.

The collar chisel cells or a composite of them that line out chambers, so-called Collar chisel chambers, form a kind of drive unit for the water flow through the sponge.

Construction of a sponge (Leucon type)

Image: http://www.trichoplax.com/student-2018/Jakob-Lecture-3-Porifera-1.pdf

In such a sponge of the leucon type (a sponge type with numerous collar chisel chambers), the water flow would flow into the sponge via the pores, then passed through it via a branched channel system. The black underlying cavities would be such collar chisel chambers in which many collar chisel cells form drive units for the water flow. They lie at the transition to the operating channel system via which the water in the sponge is guided into a larger cavity (spongocoel), into which the channels open and then exits through an opening. LG