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78 Cards in this Set
- Front
- Back
function of oracle |
detect dissolved chemicals |
|
function of pharynx |
muscular extension of gastrovascular cavity used for ingesting food |
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what is an acoemlomate |
animals whose central space is filed with tissue; lacking a body cavity |
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what is a monoecious organism |
contains both male and female reproductive structures |
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Why do you suppose the pharynx is centrally located on the body, as opposed to being located at the anteriorend of the animal? |
Its central location in the body permits a uniform delivery of nutrients to all portions ofthe body |
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List several features of planaria that suggest adaptation to a free-living lifestyle. |
Cephalization and sensorystructures such as eyespots and auricles; reduced cuticle, more body space devoted to digestion |
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What specifi purposedoes an excretory system serve? |
It rids the body of cellular wastes and plays a significant role in osmoregulationby concentrating toxic metabolic by-products and channeling them out of the body, while conserving water. |
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Why do you suppose so much of the body cavity in flkes is devoted to reproductive structures? |
As internalparasites that ingest body fluids that need little digestion to extract nutrients, flukes do not require an extensivedigestive system |
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Is the digestive system of flkes complete or incomplete? |
incompelete |
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What are the two intermediate larval stages in the life cycle of flukes? |
Cercaria and miracidium |
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What defensive provision do flukes possess for protection against the digestive enzymes of their hosts? |
the cuticle |
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Describe the changes that occur in tapeworm proglottids as they mature. |
hey are shifted toward the rear of the body and gradually increase in size, with the male reproductive organs ofa given progrottid maturing fist, followed by the female reproductive organs. |
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A true coelom is completely lined with: a. epidermis b. cilia c. gastrodermis d. mesoderm e. flagella |
d. mesoderm |
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what is egestion? |
the removal of indigestible material from the digestive system |
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what is excretion? |
the removal of wastes produced by the actions of cellular metabolism |
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Define cephalization and discuss its significance. |
the concentration of nervous tissue andsensory structures at the anterior end of the body, and has characterized all bilaterally symmetrical animalssince their origins. |
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Why does the tapeworm lack a mouth, well-developed sensory structures, and a digestive system? |
their individual cells are able to absorb nutrientsfrom the host directly through the epidermis, making a mouth and digestive system unnecessary, Sensory organsare also unnecessary because tapeworms spend the adult portion of their life cycle inside the body, where sensoryorgans would not provide any additional advantages. |
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Phylum and class |
Platyhelmnithes, class trematoda |
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function of A |
Reproduction |
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structure B |
uterus |
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what does system foes C belong to |
digestive system |
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function of D |
feeding |
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what is the space in E |
gastrovascular cavity` |
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phylum and class of these organisms |
platyhelminthes; turbulleria |
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1 |
pharynx |
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2 |
auricles |
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3 |
eyespots |
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4 |
gastrovascular cavity |
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what class does this belong to
|
Trematoda |
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1 |
oral sucker |
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2 |
intestine
|
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3 |
uterus
|
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4 |
pharynx
|
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5 |
ventral sucker
|
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6 |
yolk glands
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7 |
ovary
|
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8 |
testes |
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9 |
excretory bladder
|
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class and phylum |
taenia; platyhelminthes |
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1 |
scolex |
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2 |
immature proglottids
|
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3 |
mature proglottids
|
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4 |
gravid proglottid |
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5 |
vagina
|
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6 |
hooks
|
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7 |
genital pore |
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8 |
ovary
|
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9 |
hooks |
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10 |
uterus |
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a |
mouth |
|
b |
pharynx
|
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c |
intestine
|
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d |
pseudocoelom
|
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e |
genital pore
|
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f |
vagina
|
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g |
uteri
|
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h |
oviduct
|
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i |
ovary
|
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j |
vas deferens
|
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k |
testis
|
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l |
seminal vesicles |
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m |
cuticle |
|
a |
dorsal nerve cord |
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b |
intestine
|
|
c |
ventral nerve cord
|
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d |
pseudocoelmon
|
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e |
testies
|
|
f |
ovaries
|
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g |
oviduct
|
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h&i |
uterus; eggs |
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what phylum does ascaris belong t |
nematoda |
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what does the excretory pore do? |
releases metabolic wastes out of body |
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what does the genital pore do |
receives sperm and sends it to seminal receptacle |
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what is the scolex and what does it lack |
anterior end of tapeworm; lacks sensory structures |
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does an immature proglottid have reproductive organs? |
no |
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which part of the proglottid contains feritlized eggs, immature, mature, or gravid? |
gravid |
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what are the lateral lines of the roundworm used for? |
release nitrogenous wastes in form of ammonia and urea |
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what is the pseudocoelom |
body cavity line with gastrodermis and mesoderm on outside |