This cookie is set by GDPR Cookie Consent plugin. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Sponges are characterized by the possession of a feeding system unique among animals. The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges). They are diploblastic animals with two layers, the outer dermal layer and the inner gastral layer.Body shape can be cylindrical, vase-like, rounded or sac-like.They are generally marine aquatic organisms, with a few freshwater species.These are pore-bearing multicellular animals.Ĭharacteristic Features of Phylum Porifera.
What are the characteristics of phylum Porifera? What characteristics do all Porifera share? The movement of the flagella of all the collar cells in the sponge creates a current that draws water-containing food into the sponge through the ostia.Īlthough adult sponges are fundamentally sessile animals, some marine and freshwater species can move across the sea bed at speeds of 1–4 mm (0.039–0.157 in) per day, as a result of amoeba-like movements of pinacocytes and other cells. The choanocytes line the inner spongocoel, or body cavity.
Water is pulled into the sponge via internal choanocyte cells, which take in water through the sponge’s outer pores. In summary, sponges – or poriferans – do not have a true circulatory system as most animals do. The majority of sponges are marine, living in seas and oceans. Sponge larvae are able to swim however, adults are non-motile and spend their life attached to a substratum through a holdfast. Phylum Porifera (“pori” = pores, “fera” = bearers) are popularly known as sponges.
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