WFSC 335: EXAM 2
83 Cards in this Set
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Parenchyma
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The solid mesodermal, supportive tissue which characteristically fills acoelomate animals
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Protonephridium
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A primitive osmoregulatory-excretory organ with tubules ending in specialized "flame cells
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Hermaphroditic
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The condition of having both male and female reproductive systems present in the same individual.
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Tegument
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An unciliated living syncytium which forms the outer covering of certain invertebrates such as trematodes
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Muller's Larva
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The free-swimming larva of certain polyclad flatworms
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Syncytium
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A multinucleated mass of protoplasm resulting from the fusion of individual cells.
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Cirrus
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The eversible penis-like structure of flatworms
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Laurer's Canal
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A vestigial canal seen in certain flatworms which is generally equivalent to a vagina
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Onchomiracidium
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The larval form of monogenetic trematodes
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Gyrodactyloid larva
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The larval stage of monogenetic trematodes
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Opisthaptor
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The posterior attachment organ in monogenetic trematodes
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Miracidium
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The first free-swimming larva of digenetic trematode
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Cercariae
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A polyembryonically produced, free-swimming or crawling larval stage of digenea.
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Metacercariae
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The encysted pre-adult stage in the life cycle of most flukes
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Ootype
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The female genital chamber where eggs are formed in certain platyhelminthes
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Sporocyst
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A germinal sac which is part of polyembryony of flukes
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Redia
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A germinal mass found in the polyembryony of some flukes that is somewhat like sporocyst but which has a pharynx, locomotory buds and an intestinal cecum.
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Scolex
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Attachment organ of tapeworms
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Proglottid
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The segment-like unit of the strobila of tapeworms
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Acetabulum
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The ventral sucker used for attachment in flukes
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Aveola
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The ventral sucker-like attachment organ of aspidogastrids
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Microthrix
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The highly folded, specialized outer layer of the tegument of cestodes
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Cysticercus
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The larval form found in the life cycles of certain cyclophyllidean tapeworms
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Gravid Proglottid
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Proglottids of tapeworms which have become full of eggs
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Coracidium
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The ciliated first larval stage of Pseudophyllidean tapeworms
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Lycophore larva
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Specialized larva of cestodarians which develop in the egg
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Oncosphere
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The nonciliated first larva of certain tapeworms which develops in the egg
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Hexacanth
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The larval oncosphere of certain tapeworms with six hooks on the larval cercomere.
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Rhynchocoel
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A specialized cavity in nemertines which houses the proboscis apparatus.
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Circular Muscles
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Muscles that extend around the body of an organism
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Peritoneum
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A membrane lining a principle cavity of an organism
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Gonopore
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Opening of the reproductive systems of an organism to the outside.
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Longitudinal Muscle
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Muscles that stretch up and down the body of an organism
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Proboscis
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A feeding structure of nemertines which is ventral under hydrostatic pressure to capture prey.
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Pilidium Larva
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Larval form in the life cycle of some species of nemertines
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Rhabdites
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Membrane-bound, rod-shaped secretions released to the surface to form mucus.
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Pseudocoel
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A secondary body cavity derived from the blastocoel and located between the endoderm and mesodermal tissues.
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Pharynx
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The region between the mouth and the esophagus of many invertebrates which may be muscular and is responsible for moving food materials into the intestine.
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Protonephridium
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An osmoregulatory/ excretory organ found in the more primitive invertebrates which is essentially composed of a collecting tubule which ends the central chamber of a flame bulb
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X-organ
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Part of a neurosecretory complex thought to be associated with chromatophoric display and sexuality in certain crustaceans and gastrotichs
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Spermatheca
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A term used in some species of invertebrates for the seminal receptacle
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Furca
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Anal or posterior extensions which are usually found in pairs in many invertebrate groups including the gastrotrichs
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Proboscis
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An invaginable attachment organ found at the anterior end of acanthocephalans which usually is armed with scleritized hooks or spines.
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Proboscis receptacle
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A sac-like structure in the anterior end of acanthocephalans which receives the proboscis when it is invaginated
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Lacunar system
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A fluid filled system which connects with the lemnisci sacs and is located just under the tegument of acanthocephalans
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Lemniscus
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Two sac-like organs located in the anterior region of the body of acanthocephalans
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Central body ligament
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A ligament that stretches through the pseudocoel from the anterior to the posterior of the body of acanthocephalans on which the body organs are supported.
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Presoma
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The combination of the proboscis and the neck of acanthocephalans
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Soma or metasoma
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The body of an acanthocephalan including everything except the presoma
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Cement glands
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Specialized glands of male acanthocephalans which produce a cement-like substance.
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Copulatory bursa
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A specialized copulatory structure located at the posterior end of male acanthocephalans which is used to hold the female during copulation
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Saeftigen's pouch
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The pouch-like structure of male acanthocephala which hydraulically controls the copulatory bursa
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Uterine bell
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A bell-shaped structure found in the female reproductive system which sorts out the fertilized eggs
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Acanthor
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The larval stage that develops from the egg in acanthocephalans
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Acanthella
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The larval form of acanthocephalans which is infective to the definitive host.
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Vestibule
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A simple preoral chamber as seen in some nematodes
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Buccal cavity
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A highly modified preoral or postoral chamber as seen in nematodes such as hookworm
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Cuticle
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An outer nonliving body covering, as seen in the nematodes, which must be shed to accommodate growth
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Hypodermis
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The layer found underlying the cuticle in nematodes which is responsible for secreting the new cuticle after molting
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Cloaca
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A common chamber that receives both the intestinal tract and the reproductive tract and has an opening to the outside. This is seen in male nematodes
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Vulva
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A thickened region of the cuticle in female nematodes which surrounds the female genital pore forming lip-like projections.
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Filariform
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A long slender larval form seen in the life cycles of some nematodes where penetration and tissue migrations is required
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Rhabditaform
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A short stubby larval form seen in many nematode life cycles where penetration and tissue migrations is required
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Stichosome cells
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Specialized cells in which the capillary esophagus of Trichurata is embedded. These glands are thought to be secretory.
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Spicule
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A proteinaceous rod-like structure associated with the genital pores of many species of male nematodes which is used to hold the female in place during copulation and to allow for transfer of sperm to the female
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Renette cell
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A specialized excretory cell of many nematodes which surrounds the primary excretory duct
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Corona
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The ciliated crown of members of the Rotifera.
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Circumapical Band
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Band-like series of cilia surrounding the mouth region of rotifers
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Mastax
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The complex pharynx of the rotifers
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Germovitellarium
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The combined ovary and yolk gland of the rotifers
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Spur
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A posterior, terminal appendage occurring in pairs in rotifers
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Pedal Glands
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Glands found in the posterior of rotifers which produce a cement-like substance for attachment to a substrate.
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Trochal Disc
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One of the two discs forming the oral region of certain rotifers
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Trochus
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The anterior band of cilia found on the trochal disc of certain rotifers.
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Cingulum
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The posterior band of cilia found on the trochal disc of certain rotifers
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Zonites
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The divisions or segments in the chitinous cuticle of Kinorhyncha
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Scalids
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The cirlet of spines at the tip and base of the protrusible cone of Kinorhyncha
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Placids
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The cuticular plates of the neck which close over the retracted head in Kinorhyncha
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Lorica
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Cuticular covering as seen covering the abdomen of members of the phylum Loricifera.
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Scalids
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The curved body spines found in several invertebrate phyla
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Introvert
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The cone-shaped anterior end of members of the phylum Loricifera
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Thorax
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The region between the head and abdomen of numerous invertebrates bearing exoskeletons.
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Higgins larva
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The adult-like larval form of members of the Phylum Loricifera
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WFSC 335: EXAM 2