LAB Invertebrate I
Page # 161
MORPHOLOGY AND INVERTEBRATES I
(Campbell, , 7
ed., pages 630-636, 638-656, 8
ed. 658-664, 670-682)
: at the completion of this exercise you should be able to:
Compare and contrast the way in which major invertebrate phyla solve problems of living in a freshwater,
marine, or terrestrial environment.
Think of locomotion, body support, protection, food acquisition,
osmoregulation, and water balance.
Describe the various body plans of organisms and relate them to the ecology of organisms.
List features, thatdistinguish animals from protists, plants, and bacteria.
Discuss the similarities and differences among the organ systems of Cnidarians, Platyhelminthes,
Annelids, and Molluscs.
Know the anatomy of representative species.
Define and discuss: radial and bilateral symmetry, cephalization, open vs. closed circulatory systems and
Apply these terms to the various phyla.
Compare modes of locomotion.
Be familiar with the demonstrations of various members of these phyla.
The pre-lab on page is due at the beginning of lab.
The worksheet and chart should be filled out as you
work through the lab.
The worksheet is due at the end of lab.
The review sheet should be reviewed
during the lab.
Review the phylogenetic tree on page 148 as it summarizes some of the main features evolved by the
various taxonomic groups.
anatomical terms and study several representative
Platyhelminthes, Annelida, and Mollusca.
organisms differ in some aspects, but to some
extent, each engages in food gathering, digestion,
excretion, and responsiveness to the environment,
examine the anatomy and physiology of various
organisms you will need to build a vocabulary of
terms that refer to body planes, sections, and
The section on morphological
terms should help.
A review check list and a chart
for each lab is found in the appendix.
Fill out the
worksheets and charts as you do the lab.
of selected terms can be found at the end of this
Please examine the various demonstrations
of animal diversity.
You will work in pairs for the
Know the following anatomical terms.
1 helps clarify the terms.
Know them, as they will
be used frequently.
describing the back portion of a
describing the lower surface of a
describing the mid region of an
the sides, right and left
the head end, or the part, which
the tail end of the animal
away from the main mass of the
body (e.g., the fingers)
near the main mass of the body
(e.g., shoulder, thigh)