Ch. 25 & 26
Sponges & Cnidarians Flatworms & Roundworms Animal Characteristics Vocabulary
Row 1, Col 1 How do sponges obtain their food? Filter feeding
1,2 What phylums do flatworms and roundworms belong to? Platyhelminthes & Nematoda (respectively)
1,3 Name 3 specific characteristics of animals. Eukaryotic, multicellular, heterotrophic, no cell walls
1,4 Digestion in cnidarians takes place in the: Gastrovascular Cavity
2,1 Describe the ‘tissues’ of sponges. Lack true tissue; endo and ectoderm only
2,2 What is the name given to free swimming flatworms? Planarians
2,3 Distinguish between: Acoelomate Psuedocoelomate Coelomate No body cavity, partially lined with mesoderm cavity, Completely lined with mesoderm cavity
2,4 An animal whose blood moves throughout its body within blood vessels has a(n) Closed Circulatory System
3,1 What are the 3 classes in Phylum Cnidaria and what organisms are found within them? Hydrozoa: hydras, Scyphozoa: jellyfish, Anthozoa: s.a. & coral
3,2 Name 3 characteristics about Nematodes. Pseudocoelomate, digestive track w/ 2 openings, bilateral symmetry
3,3 The embryo layer that forms the skin and nervous tissue is the: Ectoderm
3,4 A parasitic tapeworm has a knob-shaped head, called a(n) __ by which the worm attaches itself to the host’s internal wall. Scolex
4,1 Describe the nervous system of a cnidarian. Nerve Net w/o control center – very simple
4,2 What are the most common parasites living in children in the United States? Pinworms
4,3 Animals with bilateral symmetry find food and mates and avoid predators more efficiently because…. They have the ability to see in all directions
4,4 Sponges are considered ______ because an individual sponge can produce both eggs and sperm. Hermaphrodites
5,1 Explain the different body forms possible for organisms in Phylum Cnidaria Polyp & Medusa p.700
5,2 Describe the life cycle of a fluke. p. 710
5,3 If the gastrula develops into a mouth, the organism will be a: Protostome
5,4 A tapeworm has its reproductive organs in segments called: Proglottids