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35 Cards in this Set
- Front
- Back
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what kind of symmetry do pseudocoelomates have?
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bilateral
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what kind of tissue layer?
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triploblastic
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what is pseudocoel? do they all have it?
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fluid-filled body cavity---some have it
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what sizes are pseudocoelomates?
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they have a large variation in sizes.
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what kind of epidermis and what do they look like?
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syncytial and unsegmented
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what kind of muscles do pseudocoelomates have?
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longitudinal muscle fibers
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Which of the pseudocoelomates do not have a complete disgestive tract?
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Acanthocephalans
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what are 3 aspects of their reproductive stuff?
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gonads
dioecious male smaller than female |
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sexual dimorphism
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1 gender bigger than the other--- fmeles need more room for eggs
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what is the pseudocoelomates respiratory system like?
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they don't have one
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excretory system for pseudocoelomates?
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some have canals and protonephridia
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what is the nervous system like for pseudocoelomates?
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cerebral ganglia
or nerve rings sense organs |
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Phylum Nemertinea, have what present?
coelem? |
cilia and rhabdites, no coelem
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Phjylum Nemertinea has a reversible---what? and what is it and where it is located?
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proboscis---invaginable organ for attachement and feeding---in rhynchochoel
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fluid in Phylum Nemertinea may contain:
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amoebocytes
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what is special about Phylum Gastrotricha?
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they have a furca
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what are the two eggs types of Phylum Gastrotricha?
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dormant and a type that hatches after 4-5 days
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Phylum Acanthocephala do not have a ...
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digestive tract
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all in Phylum Acanthocephala are....
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endoparasites with a 2 host lifecycle
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with Phylum Acanthocephala morphology split into 2
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Presoma: proboscis + neck
Metasoma: rest of body |
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in showing pic of Phylum Acanthocephala
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Saeftigen's pouch, cement glands, testes
lemnisci |
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Phylum Nematoda, what is excretory system like?
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Tubular H-shaped system with renette cells to osmotically regulate system
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some in Phylum Nematoda a facultative meaning...
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Parasitic and free-living stages in life cycle
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Phylum Nematoda: Class Aphasmidae
have? lack? |
amphids, phasmids
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what are amphids and what class and phylum are they found?
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tactile receptors that are well developed behind mouth and lips
Phylum Nematoda, Class Aphasmidae |
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what are phasmids and whatr class/phylum are they found?
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Sensory pits on posterior extremities
Phylum Nematoda and Class Aphasmidae |
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In Trichinella---what phylum/order
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Phylum Nematoda
Order Trichurata |
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what is lifecycle of Trichinella?
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you get it from undercooked pig, human, bear.
cyst is freed by digestive enzymes. females embed into walls of intestines. larvae in blood. encyst in muscle. |
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what phylum and order is the pharynx divided into 3 areas?
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Phylum Nematoda, Order Rhabditata
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Males have well developed copulatory bursa
phylum/order |
Phylum Nematoda
Order Strongylata |
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Necator
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adult in human intestine
relased in feces. larva enters through skin |
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Ascaris
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man infected by ingesting infected eggs.
cough swallow |
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Phylum Nematoda: Order Oxyurata
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Pinworms. enterobius
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Wuchereria
phylum/order |
Phylum Nematoda: Order Filiarata
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Wuchereria causes
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filariasis
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