Lab 2: Trematodes

Question 1

True or False: Trematodes have a complete digestive tract

Answer 1

False

Question 2

True or False: Trematodes are dorsoventrally flattened

Answer 2

True

Question 3

_____ are lame cells or protonephridia

Answer 3

Excretory system

Question 4

True or False: Most trematodes require 2 or more hosts and are hermaphroditic.

Answer 4

True

Question 5

True or False: Some tremeatodes can reproduce pathogentetically

Answer 5

True

Question 6

The ______ is deposited in freshwater via the feces of the definitive host. The operculum opens and a ciliated ______ swims out to penetrate an intermediate host, usually a snail (8), to which it is chemically attracted In the snail, cilia are lost, and it develops into a ______ to asexually produce more sporocysts or… ______ which also asexually produce more rediae or… Tailed ______, which emerge, swim, and penetrate a second intermediate host, the final host, or encyst on vegetation They transform into ______, which are juvenile flukes ______ grow from the metacercariae when they are consumed by the definitive host.

Answer 6

egg miracidium sporocyst rediae cercariae metacercariae adults

Question 7

______ is the most common and important fluke of ruminants

Answer 7

Fasciola hepatica

Question 8

Know the general cell structures of Fasciola hepatica

Answer 8

Question 9

What stage is this what are the cell structures?

Answer 9

Miracidia

cilia

daughter sporocysts

germ cells

Question 10

What stage is this?

Answer 10

redia

Question 11

What stage is this and what are the general cell structure?

Answer 11

cercariae

Question 12

Where do the adult worms live?

Answer 12

Hepatic biliary ducts