Lesson 1 | The Respiratory System - Weebly

Lesson 1 | The Respiratory System

Student Labs and Activities

Launch Lab Content Vocabulary Lesson Outline MiniLab Content Practice A Content Practice B School to Home Key Concept Builders Enrichment Challenge Skill Practice

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Launch Lab

LESSON 1: 10 minutes

How much air is in a breath?

Do your lungs empty completely every time you breathe out? You can use a balloon to find out.

Procedure

1. Read and complete a lab safety form.

2. Place your hands on your ribs as you breathe in and out. Record your observations below in the Data and Observations section.

3. Breathe in normally. Breathe out normally into a balloon. Twist and hold the end of the balloon.

4. Have your partner use a metric tape measure to measure around the

balloon at its widest point. Record the measurement. Let the air out of the balloon.

5. Breathe in normally again. Breathe out as much air as you can into the balloon. Twist and hold the end. Repeat step 4.

6. Switch roles with your partner, and repeat steps 2?5 using a different balloon.

Data and Observations

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

Think About This

1. Was there a difference in the two measurements? Why do you think this happened?

2.

Key Concept How do your lungs interact with the bones and muscles of

your chest?

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Content Vocabulary

LESSON 1

The Respiratory System

Directions: Use the clues and the terms listed below to complete the puzzle. NOTE: There is no empty square in the puzzle between the words of two-word terms.

alveoli larynx

breathing lungs

bronchi pharynx

cellular respiration trachea

diaphragm

2 6

3

5

7 8

9 1

E

4

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

1. tubes that branch off of the trachea

2. process that turns food molecules into energy

3. links the nose and mouth to the throat

4. a tube connected to the larynx and held open by C-shaped rings of cartilage

5. a big muscle that helps you breathe

6. sacs where gas exchange occurs

7. also known as the voice box

8. main respiratory organs

9. The letters in the vertical box spell that you are doing right now.

, which is something

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Lesson Outline

LESSON 1

The Respiratory System

A. Functions of the Respiratory System

1.

is the movement of air into and out of the lungs.

2. Air contains oxygen. Every cell in the body needs oxygen for a chemical reaction

called

.

3. During cellular respiration, oxygen is used to release energy

from

.

4. The respiratory system removes from the body.

and other waste gases

B. Organs of the Respiratory System

1. The

is a tubelike passageway at the top of the throat

that receives air, food, and liquids from the mouth or nose.

2. The

at the bottom of the pharynx keeps food and

liquid out of the rest of the respiratory system.

3. Air passes from the pharynx into a triangle-shaped area called

the

.

4. From the larynx, air moves into the windpipe or that is held open by C-shaped rings of cartilage.

, a tube

5. The trachea branches into two narrower tubes called that lead into the lungs.

6.

are the main organs of the respiratory system.

a. From the bronchi, air passes into smaller and narrower tubes in the lungs

called

.

b. The tubes in the lungs end in microscopic sacs called

.

c.

occurs at the large surface area of the alveoli.

C. Breathing and Air Pressure

1. When high levels of carbon dioxide build up in your

,

the nervous system signals your body to breathe out, or exhale, and air moves out

of your lungs.

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

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Lesson Outline continued

2. Below the lungs is a large muscle called the

that

contracts as you breathe.

a. Movement of the diaphragm muscle creates changes in air

that move air in and out of the lungs.

b. Inhalation occurs when your diaphragm

.

D. Respiratory Health

1. Some respiratory illnesses make be life threatening.

difficult and can even

2. The best way to maintain good respiratory health is to stay away from

and air pollution.

3. Common

illnesses include colds, flu, bronchitis,

pneumonia, asthma, emphysema, and lung cancer.

E. The Respiratory System and Homeostasis

1. Signals from the

system trigger breathing.

2. The nervous, circulatory, and respiratory systems work together to

maintain

.

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

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