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33 Cards in this Set
- Front
- Back
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Acoelomate |
Without a body cavity |
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Parenchyma |
Space between epidermis and gastrodermis filled with cellular material of me so dermal origin Living tissue |
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Parenchyma is Analogous to what in porifera |
Mesophill not living |
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Parenchyma is Analogous to what in cnidaria |
Mesoglands |
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Acoelomate |
Epidermis gut various tissues no cavity found in platyhelminthes (flatworms) |
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Pseudocoelomate |
Epidermis gut body cavity found in nematoda round worm |
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Coelomate |
Epidermis gut body cavity annelida |
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Layers of embryonic germ layers platyhelminthes |
Triple blastic cnidaria only diploblastic |
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Mesoderm gives rise to |
True muscle tissue, organs,bones,circulatory systemheart, connective tissue,muscle, reproductive system,kidney and urinary system |
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Epidermis gives rise to |
Skin tissue |
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Endoderm gives rise to |
Gut linning |
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Symmetry |
Bilateral symmetry |
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Flatworms body is flattened |
Dorso-ventrally |
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Cephalization |
Needed for directional moment possess head where central nervous system and sensory organs are located Not sophisticated in platyhelminthes ) |
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Platyhelminthes level of biological organization |
Organ system level of development mesoderm makes this possible |
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Type of digestive system |
Incomplete have no anus |
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Tapeworms digestive system / skin |
None / syncytial legumes with microtriches for increased surface area |
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Nervous system |
Paired nerve cords with lateral and crossnerves freshwater flatworms laobler type system one pair of lateral nerve cords connected to cerebral ganglia |
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Flame cells |
Osmoregulation lined with cilia that drive fluids through a series of tubules which open to outside through a series of pores |
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Excretion and respiration |
Simple diffusion flattened body helps |
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Class turbellaria |
Free living flatworms eg planarians |
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Class monogenea |
Small flukes ectoparasitic on fishes |
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Class trematoda |
Larger flukes endoparasites |
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Class cestoda |
Tapeworms |
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Dugesia/ planarian |
Class turbellaria digestive system y shaped with ever siblings pharynx for feeding |
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Turbellaria reproduction |
Asexual by fission auto fragmentation Sexually via a complex organ system |
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Dugesia reproduction |
Monecious hermaphroditic |
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Parasite organs |
Loss of sensory structure Increased reproductive potential |
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Definitive or primary host |
Where parasite has sexual reproduction |
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Secondary or intermediate hosts |
Parasite has asexual reproduction |
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Class monogenea |
One host in life cycle Found on external surface skin gills Usually cause little harm to host Attach to their host via opisthapter |
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Monogenea reproduction |
Sexual reproduction only One adult is produced per egg |
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Class trematoda |
2 or 3 hosts Intermediate host always a snail or other invertebrate Definitive host is usually a vertebrate |
