nooo.
Sponges have no proper body cavity or coelom. However, in the everyday sense of the expression, there is a cavity inside sponges, which is called a spongocoel.
bone marrow
The sponges are Acoelomates. That is they don't have coelom or body cavity.
sponges have central cavity and sea anemone have gastravascular cavity
Sponges with a leuconoid body type are the most efficient in terms of maximizing the surface area for nutrient exchange and can grow to larger sizes compared to other body types like asconoid or syconoid. These sponges have complex canal systems that increase the efficiency of nutrient uptake and waste removal.
No, they are from the Phylum Porifera.
No. A sponge is asymmetrical, because it lacks any organised body plan. Animals with radial body symmetry display a regular arrangement of body parts around a central axis, usually in a circular pattern. jellyfish, for example, have radial body symmetry.
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Baby sponges are simply referred to as larva. At the larva stage, they swim around in the water, but full grown sponges attach themselves to reefs and don't swim or move around.
The brain and the spinal cavity are located in the dorsal body cavity.
An ascon is a cavity, in the form of a bag or tube, lined with choanocytes, which forms the structure of sponges.
Sponges protect themselves with spikes in their body.