Chapter 39 Active Reading Worksheets

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CHAPTER 39 ACTIVE READING WORKSHEETS

FISHES

Section 39-3: Bony Fishes

Read the passage below, which covers topics from your textbook. Answer the questions that follow.

The heart of a bony fish has two chambers in a row. Deoxygenated blood from the body first enters the sinus venosus. Next, blood moves into the first chamber, the atrium. Contraction of the atrium speeds up the blood and drives it into the muscular ventricle, the main pumping chamber of the heart. Contraction of the ventricle provides most of the force that drives the blood through the circulatory system. Blood then enters the conus arteriosus, a thickened, muscular part of the main artery leaving the heart. The conus arteriosus has an elastic wall and usually contains valves to prevent blood from flowing back into the ventricle. The conus arteriosus smooths the flow of blood from the heart.

Write your answers in the spaces provided.

SKILL:Interpreting Graphics

1.The diagram below illustrates the flow of blood through a fish’s heart. Complete the diagram by adding the following labels: “Atrium,” “Blood flow from the body,” “Blood flow to the gills,” “Conus arteriosus,” “Sinus venosus,” and “Ventricle.”

Read each question and write your answer in the space provided.

SKILL:Sequencing Information

2.Order the statements to show how blood flows through a fish’s heart. Write “1” on the line in front of the statement that describes what happens first. Write “2” on the line in front of the statement that describes what happens next, and so on.

____a.The blood moves into the atrium.

____b.Blood flows through the conus arteriosus.

____c.Blood is driven into the ventricle.

____d.Deoxygenated blood empties into the sinus venosus.

____e.The ventricle contracts.

____f.The atrium contracts.

Read the question and write your answer in the space provided.

SKILL:Vocabulary Development

3.What is the meaning of the term chamber in the passage?

______

Circle the letter of the word or phrase that best completes the sentence.

4.Most of the force used to drive blood through a fish’s circulatory system comes from the actions of the

a.ventricle.

b.sinus venosus.

c.atrium.

d.Both (a) and (b)

Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.

Modern Biology1Bony Fishes