Name______________________________ Class __________________ Date ______________
Section 33–3 Form and Function in Chordates
(pages 857–864)
TEKS FOCUS: 3D Careers; 10A Body systems
This section explains how the organ systems of the different chordate groups
carry out essential life functions.
Feeding
(pages 857–858)
filter feeders
1. Most tunicates and all lancelets are
. They remove
pharynx
plankton from the water that passes through their
.
2. Circle the letter of the vertebrates that are filter feeders.
a. tunicates
b. flamingoes
c. manta rays
d. crocodiles
They have long bills or narrow
3. What adaptations do vertebrates have to feed on nectar?
snouts.
4. Is the following sentence true or false? Mammals with sharp canine teeth and incisors
false
are filter feeders.
5. Circle the letter of the vertebrates that typically have short digestive tracts that produce
enzymes.
a. herbivores
b. endotherms
c. carnivores
d. ectotherms
Respiration
(pages 858–859)
6. Is the following sentence true or false? Generally, aquatic chordates use lungs for
false
respiration.
7. List three examples of respiratory adaptations or structures used by chordates in
addition to gills and lungs.
Many bony fish have air sacs that are derived from the gut.
a.
Lancelets and some sea snakes respire by the diffusion of oxygen across their body surfaces.
b.
Many adult amphibians use their moist skin and the linings of their mouths and pharynxes to
c.
respire by diffusion.
Inhaling brings oxygen-
8. Describe the basic process of breathing among land vertebrates.
rich air into the trachea and into the lungs. The oxygen diffuses into the blood, and carbon dioxide
diffuses out of the capillaries into the air. Oxygen-poor air is then exhaled.
9. Is the following sentence true or false? Mammals typically have more surface area in
true
their lungs than amphibians.
10. Bubblelike structures in the lungs that provide an enormous surface area for gas
alveoli
exchange are called
.
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Guided Reading and Study Workbook/Chapter 33