Helminth

Question 1

These are multicellular eukaryotic animals that generally possess digestive, circulatory, nervous,
excretory, and reproductive systems.

Answer 1

Helminths

Question 2

_________ helminths must be highly specialized to live inside their hosts.

Answer 2

Parasitic

Question 3

The following generalizations distinguish parasitic helminths from their free-living relatives:

Answer 3

They may lack a digestive system.

Their nervous system is reduced.

Their means of locomoࢼon is occasionally reduced or completely lacking.

The reproducࢼve system is often complex

Question 4

This involves a succession of intermediate hosts
for completion of each larval stage of the parasite and a definitive host for the adult
parasite.

Answer 4

Life Cycle of a Helminth

Question 5

Is the life cycle of a parasitic helminth, simple or complex?

Answer 5

Complex

Question 6

The succession of intermediate hosts
for completion of each larval stage of the parasite.

Answer 6

developmental; asexual

Question 7

A definitive host for the adult
parasite

Answer 7

sexually mature form

Question 8

What is it called when male reproductive organs are in one individual, and female reproductive
organs are in another?

Answer 8

dioecious

Question 9

In ________ species, reproduction occurs only when two adults of the ________ sex are in the ____ host.

Answer 9

dioecious
opposite
same

Question 10

What is it called when one animal has both male and female
reproductive organs?

Answer 10

monoecious

Question 11

Two ________ may copulate and simultaneously _______ each other. A few types
of hermaphrodites fertilize themselves.

Answer 11

hermaphrodites
fertilize

Question 12

Members of the phylum __________, the flatworms, are __________ flattened.

Answer 12

Platyhelminthes
dorsoventrally

Question 13

The classes of
parasitic flatworms include:

Answer 13

Trematodes and Cestodes.

Question 14

Also known as flukes, parasitic in all classes of vertebrates and appears leaflike or cylindrical in shape.

Answer 14

Trematodes

Question 15

The body of adults covered with a syncytial tegument without cilia; usually with oral and ventral suckers that holds the organism in place, no hooks.

Answer 15

Trematodes

Question 16

_______ absorbs food through _______ nonliving outer covering; _______ canal usually with two main branches

Answer 16

Trematodes
cuticle
alimentary

Question 17

Trematodes are mostly _______; development indirect, with first host a _______, final host usually a _________

Answer 17

monoecious
mollusk
vertebrate

Question 18

______ are given common names according to the _____ of the definitive host in which the adults live.

Answer 18

Flukes
tissue

Question 19

Common blood flukes include:

Answer 19

Scbistosoma mansoni

Scbistosoma baematobium

Scbistosoma japonicum

Question 20

Scientific name of Chinese liver flukes

Answer 20

Clonorcbis sinensis

Question 21

Scientific name of Lung flukes

Answer 21

Paragonimus spp

Question 22

Scientific name of Intestinal fluke

Answer 22

Fasciolopsis buski

Question 23

Scientific name of Sheep liver fluke

Answer 23

Fasciola hepatica

Question 24

Also known as tapeworms, parasitic in digestive tract of all classes of vertebrates; general form of body tapelike

Answer 24

Cestodes

Question 25

The body of adults covered with nonciliated, syncytial tegument

Answer 25

Cestodes

Question 26

Cestodes: head or ______ with suckers or hooks, sometimes both, for ______ to the intestinal _______ of the definitive host

Answer 26

scolex attachment mucosa

Question 27

Cestodes: body usually divided into segments or series of _______ that are continually produced by the ___ region of the scolex, as long as the scolex is attached and alive

Answer 27

proglottids neck

Question 28

T or F: The farther the proglottid from the neck, the more immature is its.

Answer 28

False

Question 29

Cestodes: no ________ organs; do not ingest the tissues of their hosts; to obtain _______ from the small intestine, they _________ food through their _______

Answer 29

digestive nutrients absorb cuticle

Question 29

Cestodes: development _________ with two or more hosts; first host may be ___________ or ___________

Answer 29

indirect vertebrate invertebrate

Question 30

Cestodes: usually ________; each mature _______ contains both male and female reproductive organs; proglottids farthest away from the ________ are the mature ones containing _________ eggs, each of which is infective to the proper intermediate host

Answer 30

monoecious proglottid scolex fertilized

Question 31

Scientific name of beef tapeworm

Answer 31

Taenia saginata

Question 32

Scientific name of pork tapeworm

Answer 32

Taenia solium

Question 33

Scientific name of fish tapeworm

Answer 33

Dipbyllobotbrium latum

Question 34

Scientific name of dog tapeworm

Answer 34

Dipylidium caninum

Question 35

Scientific name of dwarf tapeworm

Answer 35

Hymenolepis nana

Question 36

Scientific name of unilocolar hydatis

Answer 36

Ecbinococcus granulosus

Question 37

Scientific name of multiocular hydatid

Answer 37

Ecbinococcus multiocularis

Question 38

Also known as the roundworms which are cylindrical and tapered at each end.

Answer 38

Nematodes

Question 39

It's symmetry bilateral and unsegmented; Its size is mostly small and some are microscopic; a few a meter or more in length .

Answer 39

Nematodes

Question 40

Nematodes: body _______; body wall a _______ or cellular epidermis with thickened cuticle, sometimes ______; muscular layers mostly of longitudinal fibers; cilia absent in several phyla

Answer 40

vermiform syncytial molted

Question 41

Nematodes: body cavity a __________-

Answer 41

pseudocoel

Question 42

Nematodes: complete digestive system with ______, ___________, and _____; pharynx muscular and well developed: ________________ arrangement; digestive tract usually only an __________ tube with no definite muscle layer

Answer 42

mouth enteron anus tube-within-a-tube epithelial

Question 43

Nematodes: ___________ and _________ organs lacking

Answer 43

circulatory respiratory

Question 44

Nematodes: reproductive system of ______ and ________ that may be single or double; sexes nearly always separate, with _______ usually smaller than females; one or two hardened __________ ________ – guide sperm to the female’s genital pore – on the posterior ends; eggs microscopic with shell often containing ______

Answer 44

gonads ducts males copulatory spicules chitin

Question 45

Nematodes: nervous system of ________ ______ or of a _________ nerve ring connected to anterior and posterior nerves chemosensory organs called _______ situated on the lips

Answer 45

cerebral ganglia circumenteric amphids

Question 46

Nematodes: ______-living and ________ forms _______ development

Answer 46

free parasitic direct

Question 47

Nematode infections of humans can be divided into two categories:

Answer 47

egg is infective or larva is infective

Question 48

Scientific name for hookworm

Answer 48

Ancylostoma duodenale and Necator americanus

Question 49

Scientific name for pinworm

Answer 49

Enterobius vermicularis

Question 50

Scientific term for intestinal roundworm

Answer 50

Ascaris lumbricoides

Question 51

Scientific name for Trichina worm

Answer 51

Tricbinella spiralis

Question 52

Scientific name for whipworm

Answer 52

Tricburis tricbiura