It has two cell layers.
Sponges protect themselves with spikes in their body.
Sponges
Ostia
nooo.
sponges have no cells which means no tissues and that means no organs because of what the cycle is there would not be any organs in the body of a sponge
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.
spongin and spicules are the sponges body support and defence
bone marrow
Everything that a human body has. Guessing?!
an asymmetrical body plan
sponges let the water enter through the canal and circulates all over the body.
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.