Term
| Ecdysozoan Characteristics (1) |
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Definition
*Cuticles
-thin flexible exoskeleton
-protects the animal but does not provide support
-bodies supported by hydrostatic skeleton
-allows the exchange of gases,minerals and water across body surface |
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Term
| Ecdysozoan Characteristics (2) |
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Definition
*exoskeleton
-thick non-living covering difficult to penetrate
-provides protection and support
-protection and suppport
-doesn't grow with org. they shed
-required the evolution of new forms of movement and respiration |
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Term
| Thin cuticles: Phylums Priapulid |
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Definition
--16 species are cylindrical
-unsegmented,worm like animals
-burrow in fine marine sediments
-capture prey with toothed pharynx which is everted through the mouth |
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Term
| Thin cuticles: Phylum Chaetagnatha |
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Definition
-arrow worms coelm is divided into head, trunk, and tail
-small; gas exchange and excretion occur by diffusion of cell surface
-lack circulatory system |
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Term
| Thin Cuticles: Kinorhyncha |
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Definition
-feed by ingesting sediments and digesting the organic material found within them (algae and dead matter)
-have no distinct larval stage
-fertilized egges develop directly into juvniles |
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Term
| Tough cuticles: Phylum Nematormorpha |
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Definition
-Include horsehair worms are extremely thin can be a few mm to a meter long
-most adults live near litter and algal mats near the edges of streams and ponds
-larvae are internal parasites of insects and crayfish |
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Term
| Tough cuticles: Phylum Nematoda |
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Definition
-Incule roundworms
-have pseudocoelom
-multi-layered, tough cuticle molts 4 times
-Pharynx
-Sexual reproduction; bihorn uterus
-very abundant and unviversally distributed
- |
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Term
| Tough cuticles: Phylum Nematoda |
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Definition
-Incule roundworms
-have pseudocoelom
-multi-layered, tough cuticle molts 4 times
-Pharynx
-Sexual reproduction; bihorn uterus
-very abundant and unviversally distributed |
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Term
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Definition
-cause trich usually infected by eating meat (uncooked pork) containing larvae of trichinella spirals
-attach to intestinal wall and feed
-later larvae become encysted in muscle tissue |
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Term
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Definition
-intestinal parasite
-harbored by 25% of world population
-single host life cycle
-sexual reproduction
-malnutrition |
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Term
|
Definition
-intestinal parasite
-harbored by 25% of world population
-single host life cycle
-sexual reproduction
-malnutrition |
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Term
|
Definition
-intestinal parasite
-harbored by 25% of world population
-single host life cycle
-sexual reproduction
-malnutrition |
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Term
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Definition
-filarial worm
-affects over 120 million people
-2 hosts
-elephantiasis
-different species causes heart worm in dogs |
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Term
|
Definition
-guinea worm
-very long slender
-ulcerated skin lesions |
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Term
| Characteristics of Arthropods |
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Definition
-exsoskeletons contain chiton
-rigid, segmented exoskeletons
-coelomates
-jointed appendages
-segmented body
-first to evade land |
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Term
|
Definition
-relative to anthropods
-thin cuticle
-unjointed appendages
-hydrostatic skeleton
-include velvet worms (peripatus) |
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Term
|
Definition
-water bearer
-fleshy, unjointed leges
-use fluid-filled body cavities as hydrostatic skeletons
-extreely small
-no circulatory system and gas exchange organs
-include echiniscus springer |
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Term
|
Definition
-related to anthropods
-extinct
-jointed legs (some modified for specific functions)
-heavily armored |
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Term
| Trends in arthropod evolution |
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Definition
-bodies divieded into segments
-apendages have many functions (walking,swimming,gas exchange,food capture,copulation and sensor perception
-muscles are attached to exoskeleton that provides protection and water proofing, enabled movement to land
-dominant animals on eart, with about 1.5 million speicies |
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Term
Phylums: Hexapoda
Class: Aporygota and Pterygota |
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Definition
*Aporygota
-wingless
-no metmorphosis
-inclutes fire brats and silver fish
*Pterygota
-winged
-complex life cycle
-metamorphosis |
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Term
| Major lineages in hexapoda |
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Definition
*1st-aquatic larvae;dragonflies and mayflies; no digestive tracts;only live long enough to mate and lay eggs
*2nd-grasshoppers,crickets,roaches,aphids,termites and cicadas;young look sim to adults
*3rd-larvae are specialized for growing and feeding
-adults are specialized for reproduction
-includes lacewings,beetles,butterlies,moths,flies,bees,wasps and ants |
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Term
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Definition
-2 body regions head and trunk;centipedes;1 pair legs on earth segment;predators;100 legged worms;
*milipeds 2 pairs of legs on each segment;million leg worms; scavangers |
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Term
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Definition
anterior region bears two pairs of appendages
classes inculde pyconogonida (sea spiders), arachnida (spiders,scorpions, harvestmen, mites,and ticks)
merostomata (horse shoe crabs |
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Term
| arachnida (spiders,scorpions, harvestmen, mites,and ticks) |
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Definition
-abundant in terrestrial enviornments
-simple life cycle |
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