Feeding:
Porifera are filter feeders, they take in water and nutrients through incurrent canals and release waste through excurrent canals. The exception of the Proifera was that they can be carnivorous too, at a tinme they can eat whole animals these animals are called crustaceans.Respiration:
Sponges have no respiatory or excretory glands or organs, all of the proess occur through diffusion through individual cells. The water also serves as the Sponges respiratory system. As the water pass through the sponge cells remove oxygen and gives off carbon dioxide into the water.Circulation:
The water current is used for circulation, dissolved gasses are brough to cells and enter the cells via simple diffusion. Metabolic wastes are also transferred to the water through diffusion. Sponges pump remarkable amounts of water.
Excretion:
A sponge has carbon dioxide and other waste removed as the water moves in and out through the pores. Gasses are brought through the cell by current and it is entered the cell through diffusion. The water that flows into the pores of the sponge exit through the Osculum.
Response:
Sponges don't have and way to sense things, they don't have eyes, nose, ears and even the sense of feel. However the sponges do have a way to carry out information within there body while adult sponges are not mobile they are able to react to certain stimuli.
Movement:
Sponges move very less most of there energy is used on reproduction. There movement has to mostly do with the water surrounding them, they move by the tide of the water. Sponges are known to move at very slow speeds because they rely on the sea.
