Flatworms

Question 1

What is the AKA FOR FLATWORMS

Answer 1

Platyheminthes

Question 2

name some differences between flatworms and helimnths ( body type, vascular system)

Answer 2

1. flatworms have a solid body without a body cavity

2. they have no respiratory or blood for the vascular system

Question 3

T/F Flatworms are usually have life cycles that are direct and have multiple intermediate host with pigs as the usual final host

Answer 3

FALSE- life cycle is indirect and tend to have only ONE intermediate host… says nothing about pigs as final host I just pulled that shit out of my ass

Question 4

Cestoda- tape worm
Digenea-Flukes

is this correct?

Answer 4

Yes

Question 5

T/F Cestoda is consider the most rare of all the tape worms to get infected with

Answer 5

False- it is considered the most extreme

Question 6

Name the general characteristics of the Cestoda tapeworm

Answer 6

1. Long and ribbon like
2. Flattened in cross section
3. adult range from fe mm to 20 meter (wtf)
4. Adult lives in the INTESTINAL tract of definitive host and the larval stage inhabits tissues of intermediate hosts
5. Adult tape worms are adapted to an intestinal life

Question 7

What is the head of the cestoda worm called and what is it used for?

Answer 7

called the Scolex

it is used for clinging to the intestinal wall

Question 8

T/F the Scolex is the way the cestoda feeds for nutrient absorption

Answer 8

FALSE!
Nutrients are absorbed through cuticle covering- feeds by diffusion of material that is passing through the lumen of the intestinal tract

Question 9

Describe what a Strobila is

Answer 9

a long ribbon composed of individual reproductive segment called proglottids
the strobilia attached to the neck then the head

Question 10

What are Proglottids and what is the significance to sex organs …. where is it generated?

Answer 10

• contains both male and female sex organs - self fertilizing
• the neck generates them

Question 11

T/F the length of a mature worm may reach to 30- 60 ft

Answer 11

TRUE

Question 12

What are the two important human species of tapeworms?

Answer 12

1. Taenia saginata ( beef)

2. Taenia solium (pork)

Question 13

t/f the larval forms of these two worms are in cow and pig as intermediate host

Answer 13

True

Question 14

which tape worm is considered the largest that anchor to intestine by a scolex with suckers

Answer 14

Taenia saginta

Question 15

Name some differences between Taenia solum and taenia saginata

Answer 15

1. solium is smaller

2. solium is ineffective to human in both the cycticercus and egg stage

Question 16

Describe what happens after consuming the bladder worm

Answer 16

tapeworm infection occurs

Question 17

Consuming embryonated egg

Answer 17

Cysticercosis - can lead to epileptic seizures

Question 18

Which tape worm does not require an intermediate host but house mice and flees and beetles that can serve as a vector?

a. Dignea
b. Hymenolepis (dwarf tapeworm)
c. Taenia solium (pork tapeworm)
d. Broadfish tapeworm

Answer 18

B. Hymenolepis (dwarf tapeworm)

- Cysticercoidlarvae can develop in the body cavity of these insects

Question 19

When does infection begin for the dwarf tapeworm

Answer 19

by eating the eggs - the entire cycle can occur in human without a need of an intermediate host

Question 20

T/F Humans are the definitive host for the hydatid tapeworm

Answer 20

False- Humans are accidental INTERMEDIATE hosts… sheep and other herbivores are inter. host… Dogs and canines are the DEFINITIVE hosts.