Helminthes

Question 1

Macroscopic, multicellular eukaryotic worms. Many of which are pathogenic

Answer 1

Helminthes

Question 2

Complex life cycles may differ in reproductive strategies

Answer 2

Monoecious

Dioecious

Question 3

Each worm has both sex organ (hermaphrodites)

Answer 3

Monoecious

Question 4

Male and female sex organs in different worms

Answer 4

Dioecious

Question 5

Parasitic Helminths divided into 3 group

Answer 5

• Cestodes
• Trematodes
• Nematodes

Question 6

These are acoelomate animals

• No real body cavity
• Lack their own digestive structures, line in intestines of Hosts

Answer 6

Cestodes

Question 7

These are segmented tapeworms/flatworms
-Up to 60 feet
Have a more complex life cycle

Answer 7

Cestodes

Question 8

Class Cestoda are composed of

Answer 8

Scolex

-Body

Question 9

like the head; has Hooks at the top attach to tissues (No mouth)

Answer 9

Scolex

Question 10

Is flat and long; made of proglottid: repetitive segments divide continuously; and has both sexes inside (monecious)

Answer 10

Body

Question 11

(middle proglottid) working reproductive structures

Answer 11

Mature in the body

Question 12

Filled with fertilized egg, ready to infect a new host

Answer 12

Gavid in the body

Question 13

Break off, pass through feces

Answer 13

Gravid proglottids

Question 14

10’-15’ long 75’ has been reported

Answer 14

Beef Tapeworm

Question 15

Humans are the definitive Host

• Humans shed eggs and egg filled proglottids
• Cows eat the egg (Alternate Host)
• Eggs hatch in the cow and become immature larvae called cysticercus

Answer 15

Life Cycle

Question 16

Eggs hatched in the cow and become immature larvae called

Answer 16

Cysticercus

Question 17

Are usually harmless to the cow. however, when humans eat undercooked meat they get infected with the cysts

Answer 17

Cysticercus

Question 18

Symptoms of Beef Tapeworms

Answer 18

Weight low, abdominal pain, headache, nausea

Question 19

• Made of proglottids and pass them via fecal matter (similar to beef tapeworm)
• Humans can get the cysticerus in their muscle

Answer 19

Pork tapeworm

Question 20

Make human the definitive host

-Can also be a intermediate host……. not likely

Answer 20

Pork tapeworm

Question 21

Symptoms of a pork tapeworm are

Answer 21

Weight loss, abdominal pain, headache, nausea

Question 22

Beef tape worm is also known as

Answer 22

Taenia Saginata

Question 23

Pork tapeworm is also know as

Answer 23

Taenia solium

Question 24

This is Dog Tapeworm

• only 3 proglottids (immature, mature, gravid)
• once an immature proglottid is formed, a gravid proglottid is released

Answer 24

Echinococcus Granulosus

Question 25

Life cycle: The dog is the definitive host (echinococcus granulosus)

Answer 25

The adult worm lives in the intestines of the dog

• Sheds eggs (poop) and herbivores (ex. cattle) eat the eggs
• Occasionally humans can ingest food contaminated by dog feces and ingest larvae which form hydatid cysts
• Dogs like anus, then humans mouth/face

Question 26

(Echinococcus granulosus) Hydatid Cysts:

Answer 26

Can rupture and larvae can spread through body

Question 27

Protozoan are____________.

Answer 27

Animal-like eukaryotes that belong to the kingdom protists