Name
Date
Echinoderms and Invertebrate Chordates
Before You Read
Before you read the chapter, respond to these statements.
1. Write an A if you agree with the statement.
2. Write a D if you disagree with the statement.
Before You Read
Echinoderms and Invertebrate
Chordates
• A sea star can make its stomach come
out of its mouth.
After You Read
• Many echinoderms can regrow lost body
parts.
• A lancelet’s body organs are visible
through its skin.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
• A tunicate is called a sea squirt because
it is the smallest creature in the sea.
Science Journal
Write what you know or stories you have heard about sea stars, sea urchins, and other
spiny sea creatures.
Echinoderms and Invertebrate Chordates
279
Name
Date
Echinoderms and Invertebrate Chordates
Section 1 Echinoderm Characteristics
Details
Main Idea
Skim Section 1 of the chapter. Write three questions that come to
mind from reading the headings and illustration captions.
1.
2.
3.
Review
Vocabulary
Use your book or dictionary to define endoskeleton.
endoskeleton
New
Vocabulary
Use your book or dictionary to define each term.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
pedicellaria
water-vascular system
madreporite
tube foot
ampulla
Academic
Vocabulary
Define aid to show its scientific meaning.
aid
280
Echinoderms and Invertebrate Chordates
Name
Date
Section 1 Echinoderm Characteristics
Main Idea
Echinoderms Are
Deuterostomes
(continued)
Details
Analyze the importance of deuterostome development.
I found this information
.
on page
Body Structure
I found this information
.
on page
Sequence the steps that occur in the water-vascular system to
enable an echinoderm to move. Complete the flowchart by writing
the letters of the scrambled steps in the proper boxes.
A. Water is forced into the tube foot.
B. Water moves through the stone
canal to the ring canal.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
C. Water is drawn into the
madreporite.
D. The muscles of the ampulla
contract.
E. With hydraulic suction, the tube
foot attaches to a surface.
F. Water moves to the radial canals.
The echinoderm moves.
Identify the echinoderm that moves in the described way.
Echinoderm
Movement
burrows into rocky areas using movable spines
makes snakelike movements using tube feet and
arms
uses cirri to grasp soft sediments on the seafloor
crawls using tube feet and body wall muscles
Echinoderms and Invertebrate Chordates
281
Name
Date
Section 1 Echinoderm Characteristics
Main Idea
Echinoderm
Diversity
I found this information
.
on page
(continued)
Details
Name the class of each echinoderm described below.
Echinoderm Class
Characteristics
cucumber shape; leathery covering;
tentacles near mouth
body encased in a test; burrows
often five arms; arms regenerate; no
suction cups on tube feet
often five arms; tube feet used for
feeding and movement
no arms; tube feet located around a
central disk
sessile for some part of life
List echinoderm strategies for coping with potential predators.
sea stars:
sea urchins:
sea cucumbers:
Ecology of
Echinoderms
I found this information
.
on page
Analyze the effect of echinoderms on other organisms in the
following situations.
Activity as bioturbators:
Unexplained population explosions of crown-of-thorns sea stars:
C ONNECT
Give an example of regeneration in humans. Then give an
example of regeneration in echinoderms that is beyond the capability of humans.
282
Echinoderms and Invertebrate Chordates
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
brittle stars: