Phylum Porifera (Pore-bearing Animals) THE SPONGESPorifera comes from the Latin terms porus which means “pores” and ferre meaning “to bear”
SPONGES Sponge are marine while some are fresh water species They vary in color- white to yellow to purple to black The body of sponges consist of tiny spores They provide habitat for other animals Sponges are sessile, while their larval are ciliated and free swimming
REPRODUCTION OF SPONGES Sponges reproduce sexually orasexually. Most freshwater speciesreproduce asexually through theformation of buds and gemmules. Sexually, these animals develop eggsand sperms. Sperms shed into the waterfertilize the egg in another sponge bypassing through the correct pores.
Phylum Coelenterata The HydraCoelenterata comes from the greek words koilos which means “hallow”and enteron which means “intestine”
The hydra These are hollow cuplike animals which have a central digestive cavity and a nervous system of a primitive kind. They are often vase shaped occurring singly or in colonies. Coelenterates are aquatic and mostly marine They are color white, green, and brown species of hydra which live in quiet ponds, lakes, and streams.
Example of phylum CoelenterataHydra jellyfishCoral jellyfish corals
Reproduction of Hydra Hydra performs asexual andsexual reproduction. Asexually itforms buds which develop knobsthat grows into tentacles fromwhich individual hydras undergoegg fertilization during rainyseason and cooled months.
Phylum PlathyhelminthesPlathyhelminthes comes from greek terms platys which means “flat”and helmis which means “worm”.
Flatworms flat-bodies worm are small, inconspicuous animals with digestive nervous, excretory and reproductive system. Some are free living while others are parasitic living in the bodies of various animals including humans. Thousands of species of flatworms are bilaterally symmetrical body flattened from the dorsal side to the ventral side.
Planaria a free living flatworm Non parasitic flatworms that thrive in freshwater habitats most especially in ponds and streams They range from 8mm to 16mm in length They vary in color from black to brown to white. They are bilaterally symmetrical with a blunt anterior and pointed posterior end.
Reproduction of Planaria Reproduction is done eitherasexually by fission or sexually bygametes. Every planaria ishermaphroditic that is why cross-fertilization is possible as eggs are shedin capsules. Likes spongers and hydrasmany of planarians have a remarkablepower of regeneration.