Science Notebook - Student Edition

Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

Circulator y, Respirator y, and Excretor y Systems 345

Circulatory, Respiratory, and Excretory Systems

Before You Read

When you breathe in, oxygen enters your lungs. Describe what you understand about how

oxygen from the air reaches the cells in your body.

Science Journal

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 Circulatory, Respiratory, and Excretory Systems After You Read

• Your pulse rate is the number of times
  your heart beats each minute.


• If you need a blood transfusion, the
  donated blood must be the same type as
  yours.


• Breathing and respiration are two names
  for the same process.


• The components of the excretory system
  are the lungs, skin, and kidneys.