Kingdom: Animalia Subkingdom: Parazoa Phylum: Porifera ) ( ex: Sponges Sponges are sessile with porous bodies and choanocytes . The germ layers of sponges are not really
tissues because the cells are relatively unspecialized . Sponges do not have nervous, digestive or muscle systems. Most sponges are marine and some live in fresh water. The body of a sponge consists of two cell layers separated by a gelatinous region, the mesohyl . Most sponges are hermaphrodites ( bisexual) bisexual) , with each individual producing both sperm and eggs. The body of a simple sponge resembles a sac Choanocytes use their flagella to create water currents through external pores called ostia .
Bring food (bisexual) bacteria, Protists, etc.) and oxygen and remove metabolic wastes from the center of the sponge, spongocoel. Choanocytes use collar-like rings to filter food. Wastes and water flow out a central osculum; an excurrent pore. Diploblastica 2- Phylum: Coelenterata Systematic Position: Animalia
Kingdom: Subkingdom: Metazoa Coelenterata Hydrozoa Phylum: Class: , Obelia Examples: Hydra This basic body has two Parts: the sessile polyp and the floating medusa . The polyps adhere to the substratum by the aboral end and extend their tentacles, waiting for prey. Medusas(bisexual) also called jellies) are flattened, mouthdown . They are
carnivores that use tentacles arranged in a ring around the mouth to capture prey and push the food into the gastrovascular chamber for digestion. Hydra sp. The basic body plan is a sac with a central digestive compartment, the gastrovascular cavity .
Hydra exist only in the polyp form. When environmental conditions are favorable, a hydra reproduces asexually Triploblastica 3 - Phylum: Platyhelminthes Systematic Position: Animalia Kingdom: Subkingdom: Metazoa
( Platyhelminthes (Flatworms) They are acoelomates with gastrovascular cavities They are living in marine and freshwater. They also include many parasitic species, such as the flukes and tapeworms . Flatworms are triploblastic
, with a middle embryonic tissue layer, mesoderm , which contributes to more complex organs and organs systems and to true muscle tissue. Schistosoma sp. Trematodes parasitizea wide range of hosts, and have complex life cycles with alternation of sexual and asexual stages. It requires an
intermediate host in which the larvae develop before infecting the final hosts (bisexual) human) where the adult worm lives. The fluke Schistosoma
arbitrary. topics … Existing work cannot scale to different topics ... "An Empirical Study of Gene Synonym Query Expansion in Biomedical Information Retrieval", Information Retrieval Volume 12, Issue1 (2009), Pages: 51-68. [TREC'07] Yue. Lu, Jing Jiang, Xu Ling, Xin He,...
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