Phyla Cnidaria and Ctenophora, Basic Animal Development ...

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Phyla Cnidaria and Ctenophora, Basic Animal Development & Introduction to Nervous Systems 5.8 Lab #5 - Biological Sciences 102 – Animal Biology Draw and CLEARLY label the Obelia sp. medusa from a prepared slide. Use the internet and textbook to assist you in your drawing. tentacles radial canals manubrium gonads How many gonads are observed in this species? Feeding Demonstration in a Hydrozoan Hydra, a Solitary Hydroid Phylum Cnidaria Class Hydrozoa Order Hydroida Suborder Anthomedusae Genus Hydra, Pelmatohydra, or Chlorohydra Hydras are found in pools, quiet streams and ponds often on the underside of aquatic vegetation. Your instructor will prepare a slide of hydra for your observation. The hydra may be contracted at first and then extend. Small ciliated protozoans which are symbionts of hydras are sometimes seen gliding over the body and tentacles. Your instructor will add a drop of Daphnia or similar food to the slide. Some extracellular digestion occurs within the gastrovascular cavity via enzymes released by gland cells. Food particles are then engulfed by cells of the gastrodermis and digestion is completed intracellularly. Undigested food is regurgitated as there is no anus. Observe and briefly describe the feeding reaction of the hydra below:
Phyla Cnidaria and Ctenophora, Basic Animal Development & Introduction to Nervous Systems 5.9 Lab #5 - Biological Sciences 102 – Animal Biology Class Scyphozoa Basic Body Plans & Life Cycles Clearly label the stages of the life cycle of Aurelia aurita shown below. Use the internet and textbook to assist you in with the labels.
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