Lecture 10

Question 1

Neodermata

Answer 1

adapted to parasitic life (protected from digestive enzymes, absorbs nutrients from host), no ciliature

Question 2

Aspidogastrea

Answer 2

Large, complex ventral sucker, well armored, preys on fish and turtles

Question 3

Digenea (flukes)

Answer 3

Intermediate mollusc host and final vertebrate host

Question 4

Digenea morphology

Answer 4

Oral sucker (feeding), ventral sucker (attachment)

Question 5

Trematoda (chinese liver fluke)

Answer 5

3 hosts ( snail -> arthropod or fish -> vertebrate - reaches maturity and reproduces)

Question 6

Lancet Liver Fluke

Answer 6

Eaten by ant -> eaten by bovine or human -> feces eaten by snail -> released in mucus trail where eaten by ants -> repeat

Question 7

Onchomiracidium

Answer 7

larva with three widely separated bands of ciliated cells.

Question 8

Monogenea

Answer 8

No intermediate host, Ectoparasite - aquatice vertebrate hosts (frogs)

Question 9

Cestoda

Answer 9

Canine Tapeworms

Question 10

Beef Tapeworm

Answer 10

Intermediate host is bovine, definitive (final) host is human

Question 11

Oncosphere

Answer 11

ciliated egg containing many cells (enters fish guts after ingestion of copepod)