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Tapeworms
Scolex,Proglottids,Gravid
Prolottids |
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Tapeworms,Scolex,Proglottids,Gravid
Prolottids -
They
belong
to
the
phylum
platyhelminthes.
The
intestinal
tract
of
these
worms
consists
of
a
blind
sac.
Single
worm
contains
both
male
and
female
sex
organs
(hermaphroditic).
The
life
cycle
is
rather
complex
involving
several
different
forms
and
a
number
of
intermediate
hosts.
Humans
are
definitive
or
intermediate
hosts.
The
tapeworms
(cestodes)
consist
of
a
head
region
called
a scolex,
a
neck
and
a
series
of
segments
called proglottids.
The
scolex
holds
tightly
to
the
host
tissue,
and
new
proglottids
are
produced
in
the
neck
area.
Sex
organs
are
located
in
mature
proglottids
in
the
centre
of
worm.
The
most
distal
proglottids,
called gravid
proglottids,
are
filled
with
fertilised
eggs.
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