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18 Cards in this Set
- Front
- Back
the following 3 animals have a cavitiy called a coelom
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molusks
annelids arthropods |
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__________ means that these animals first embyronic opening becomes the mouth
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protostomes
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molluscs have a three part body consisting of a ventral, muscular ________ specialized for various means of locomotion; ________ that includes the internal organs; and a _________ and may secrete a shell
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foot
visceral mass mantle |
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the nervous system of molluscs are consisted of three pairs of _________, all connected by nerves
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ganglia
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the heart in clams is called the _______
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pericardial sac
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a clam has a ________
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open circulatory system
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mucous layers on the ______ entraps food particles brought into the mantle cavity, and the cilia on the gills convey these food particles to the mouth
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gills
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channels food into the open mouth of a mollusk
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labial palps
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lies above the foot and is soft and plump; it contains the digestive and reproductive organs
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visceral mass
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segmented worms
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annelids
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segmented worms contain _________ that work against the fluid filled coelom to produce changes in width and length
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circular and longitudinal muscles
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earthworms belong to the class _______
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oligochaeta
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earthworms move by the circular and longitudinal muscles and _______
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setae
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earthworms feed on ____ in the soil
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detritus
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_______ secretes mucous that hold the worms together during mating
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clitellum
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arthropods have paired, jointed appendages and a hard _____ that contains chitin
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exoskeleton
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crayfish are a type of arthropod and subphylum called _________
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crustaceans
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_________ covers the cephalothorax
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carapace
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