Sponge animalAlthough it may look like a plant, it is immobile and slow to respond to external stimuli. However, sponges are the simplest of the multicellular animals. The scientific term for sponges is sponges or parasites. Its body is covered with small pores. The channels that end with a large opening, or what is known as cavity, and within these channels lined rooms with specialized cells called the cells of the ring, which are sticky cells, and possesses a repressive collar and the end whip, these moving back and forth to force the water to pass through the openings, Carrying material It is similar to the shape of the amoeba, which is a primordial organism that takes food into other cells within the sponge and possesses what can be likened to the skeleton. A protein called Sponge, or a silicium oxide, which expresses the silica, or combines them, has no bones, but has grills on the outer surface as a means of self-defense, and also excreted material is not desired by fish not to eat.
Feed the spongeThe sponge feeds in the filtration method, and it does it in a very effective way. It is able to capture and eat small particles such as bacteria as well as much larger molecules, and its metabolism is very slow. However, sponges grow to large sizes so that their cavities are sufficient to accommodate a person, Tropical and tropical regions. Sponges live in the bottom of the water, spread in the seas and oceans, and there are few in fresh water such as rivers and lakes, so that they attach themselves to something solid, often a rock.
ReproductionThe sponges breed sexually and sexually, most of them are female. They have only one type, some of which play male and female roles. However, they do not fertilize themselves, but play a different role in each breeding season. , And once again, the sperm are released into the water column of the male sponges, until they find their way into the female sponges, fertilization occurs internally, then the larvae are released from the female sponges and float in the water column as plankton for only a few days and then settle down and begin In growth, multiply Also through buds where a small bud grows in the tip of the sponge and grows larger and then separates from the mother sponge and is described elsewhere.
No comments:
Post a Comment