Study unit 3 18 table 1 vergelykende studie tussen

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Study unit 3 18 TABLE 1: VERGELYKENDE STUDIE TUSSEN FILUMS / COMPARITIVE STUDY BETWEEN PHYLA Maak genoeg kolomme vir alle filums / add enough columns for all the phyla Phyla Characteristics that will be studied Definition of characteristic Porifera Cnidaria Voorbeeld / Example (Taksonomie / taxonomy) Diagnostiese kenmerke / Diagnostic characteristics Tekening met sigbare diagnostiese eienskap(pe) aangedui / Drawing with visable diagnostic characteristic(s) indicated Vlakke van organisasie / levels of organization Embrioniese kiemlae / embryonic germ layers Seloom / coelom Liggaamsplanne / body plan Simmetrie / symmetry Senuweestelsel (sefalisasie) / nervous system (cephalization) Segmentasie / segmentation Tagmatisasie / Tagmatazation
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Study unit 3 19 Skelet / skeleton Vervoerstelsel / transport system Respiratoriesestelsel / respiratory system Uitskeidingstelsel / excretion system Spysverteringstelsel / digestive system Voortplantingstelsel / reproductive system
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Study unit 3 20 TABEL 2: VERGELYKENDE STUDIE BINNE ‘N FILUM / COMPARITIVE STUDY WITHIN A PHYLUM Klas / Class 1 Klas / Class 2 Klas / Class 3 Voorbeeld / Example Diagnostiese kenmerke / Diagnostic characteristics Tekening met sigbare diagnostiese eienskap(pe) aangedui / Drawing with visable diagnostic characteristic(s) indicated Enige ander eienskappe wat jy kan aandui hoe klasse van mekaar verskil / any other characteristic that may indicate the difference between the classes.
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Study unit 3 21 3.1 PHYLUM PORIFERA On completion of this study section you should be able to: Give the general characteristics of the Porifera. Distinguish between the structure of asconid (or simple) and syconid (or complex) sponges. Name, describe and give the functions and organisation of the different cell types. Critically evaluate the ecological importance of the Porifera (such as its interactions with other organisms and role in maintaining healthy ecosystems) and the dangers posed by habitat destruction (such as deep-sea trawling) to this group of organisms. Describe the structure, habitat, feeding and reproduction of sponges in general. Sources Prescribed sources: Mader and Windelspecht p. 527 Appendix 1 Introductory remarks The phylum Porifera represents the aquatic sponges, the simplest of all multicellular animals The adults are sessile, sac-like filter feeders while their larvae are free-swimming. Their bodies represent an assembly of cells in an extra cellular gelatinous matrix in which skeletal elements such as spicules (made of silica or calcium carbonate) and spongin occur. Unique cells are found in these organisms: Flagellated choanocytes (or collar cells), pinacocytes (forming the outer layer), archaeocytes (wandering amoeboid cells found in
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Study unit 3 22 the matrix between the inner and outer layers).Water flows through their spongocoel - in through in-current pores (or ostia) lined by porocytes and out through the osculum at the top.
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  • Spring '16
  • Ambani Mudau
  • Phylum, Windelspecht

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