Phylum
Annelida
The following questions will
help you to review the material from the lecture, lab as well as the
text.
-
Give a few examples of
animals
found within this taxon.
-
How many species are found
within
the phylum Annelida? During which time period did the phylum
originate
(according to the fossil record)?
-
The film emphasized a major
contribution
of the phylum Annelida in relation to global temperatures. Explain!
-
Briefly characterize the
phylum
Annelida.
-
What are the "new"
evolutionary
features of the phylum?
-
What is metamerism? What is
the
importance of metamerism?
-
What are setae? What is their
importance?
-
Give a brief overview of the
classification
within this phylum.
-
Characterize the class
Oligochaeta.
-
What is the ecological
importance
of earthworms?
-
Explain how earthworms move
(use
their anatomy as a foundation to explain their movement pattern).
-
Make a drawing of the anatomy
of an earthworm and label important structures. Do you know the
function
of each of these structures?
-
Make a drawing of a
cross-section
of an earthworm and do the same as in the question above.
-
What is a typhlosole?
-
Give a brief overview of the
anatomy
of the digestive system in an earthworm. How does it differ from a
Nematode
worm? From a flatworm? What kind of changes have occurred in the
digestive
system? Is it more efficient? If so, explain why?
-
What is the importance of the
circular and longitudinal muscles in each of the segments of an
earthworm?
-
Briefly describe the
circulatory
system in an earthworm (including hearts and the location of the
major
blood vessels).
-
How does an earthworm
exchange
gases with its surrounding environment?
-
How do earthworms reproduce?
-
Give a brief overview of the
anatomy
of the reproductive system in these animals.
-
Briefly describe the nervous
system
of an earthworm.
-
How do these animals excrete
waste
products?
-
Characterize the class
Polychaeta.
-
How does a polychaete worm
differ
from an oligochaete worm?
-
What is meiofauna? What kind
of
animals are components of the meiofauna?
-
What is a parapodium? What
kinds
of functions can one attribute to the parapodia in this class of
worms?
-
What is the difference
between
raptorial, deposit and filter/suspension feeders?
-
Elaborate on the anatomical
structures
polychaete worms use to "capture" food with each of these three
feeding
strategies.
-
What is the advantage of tube
building in these animals?
-
What kind of evolutionary
advantages
are associated with burrowing?
-
How do burrowing worms access
nutrients? How do they do gas exchange?
-
What is a "spaghetti" worm
(terebellids)?
Briefly describe the life style of these worms.
-
How do "feather duster" and
"christmas
tree" worms capture food? Perform gas exchange?
-
What is epitoky?
-
Briefly describe the "class"
Hirudinea.
-
Are leeches really a member
of
the phylum Annelida? Describe the Annelid feature/s of a leech.
-
Why do leeches suck blood?
Briefly
explain how leeches are able to gain access to blood from a host?
-
Describe the anatomy of a
leech?
How is the anatomy of a leech correlated to its feeding behavior?
-
What is the importance of
leeches
in human medicine (past and present)?
-
Briefly summarize the
characteristics
of the phylum Annelida as well as the major attributes of the
classes within
the phylum.
Self-test:
Recommended Reading:
