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Lesson 5 The Circulatory System

Bellringer

Write as many words or phrases that describe the

circulatory system as you can.

Chapter 8




Objectives

• Trace the path of blood through the heart.

• Explain the function of the circulatory system.

Chapter 8




Start Off Write

How does the body stop a cut from bleeding?

Chapter 8




Blood

Blood is made of the following things:

1. plasma

2. red blood cells

3. white blood cells

4. platelets

Chapter 8




Blood continued

• Arteries Arteries carry blood away from the heart

to various organs.

• Veins Veins carry blood from various parts of the

body back to the heart.

• Capillaries Capillaries are very small tubes that

connect arteries and veins. Some capillaries are so

small that you need a microscope to see them.

Chapter 8



Lesson 5 The Circulatory SystemChapter 8



Lesson 5 The Circulatory SystemChapter 8

The heart muscle contracts to pump blood through the blood vessels.

The Heart

Please insert Figure 11

from Decisions in

Health, Level Green, p.

177



Lesson 6 The Respiratory System

Bellringer

Describe the pathway of the air that you breathe.

Chapter 8




Objectives

• Describe the breathing process.

• Explain how cells exchange oxygen and carbon

dioxide with the air.

Chapter 8




Start Off Write

Why do people have trouble breathing when they have

a cold?

Chapter 8




The Path of Air

• Air enters the body through the nose and the mouth

and then moves to the pharynx, or throat. The air

moves through the following organs next:

1. larynx

2. trachea

3. bronchi

4. lungs

Chapter 8



Lesson 6 The Respiratory SystemChapter 8




Gas Exchange

• The Alveoli The lungs and the blood exchange

oxygen and carbon dioxide in the alveoli.

• The Capillaries of the Lungs The blood in the

lung’s capillaries picks up oxygen from the alveoli

and delivers it to the body’s cells. When the blood

returns to the lungs, it brings carbon dioxide.

Chapter 8




The Breathing Process

• Inhalation Inhalation is the process in which the air

enters the lungs.

• Exhalation Exhalation is the process in which the

air leaves the lungs.

Chapter 8



Lesson 7 The Nervous System

Bellringer

Many parts of your body take in information from your

surroundings and send it to your brain for processing.

List as many of these body parts as you can.

Chapter 8




Objectives

• Describe the functions of the nervous system.

• Explain how the nervous system responds to the

body’s needs.

Chapter 8




Start Off Write

What is a reflex reaction?

Chapter 8




Parts of the Nervous System

• The Brain The major organ in the nervous system

is the brain. Different parts of the brain control

different body functions.

• The Spinal Cord The spinal cord is an organ that

carries messages to and from the brain. These

messages travel through groups of nerves.

Chapter 8




Parts of the Nervous System

• Nerves A nerve is a bundle of cells that conducts

messages from one part of the body to another.

Chapter 8



Lesson 7 The Nervous SystemChapter 8




Responding to Stimuli

• What Are Stimuli? Changes that cause a reaction

are called stimuli. The eyes, ears, tongue, nose,

and skin sense stimuli outside the body and send

messages to the brain and spinal cord through

nerves.

• Reflexes An automatic response to stimuli is called

a reflex.

Chapter 8



Quote of the Day

“The chief function of the body is to carry

the brain around.”

—Thomas A. Edison

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Chapter 8 Lesson 5 The Circulatory System Bellringercoachjameshealth.weebly.com/uploads/5/3/6/2/... · Chapter menu Resources Lesson 6 The Respiratory System The Path of Air • Air