The path of oxygen in our body
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The Path of Oxygen in Our Body. Hello! I’m your guide through your Respiratory System! My name is, “Mr. Oxygen Molecule,” but you can call me, “Mr. O 2 .”. The Path of Oxygen in Our Body: The Story of Respiration. Ta ble of Contents Introduction Inhale Mouth and Nose Nasal Passage

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The path of oxygen in our body

The Path of Oxygen in Our Body

Hello! I’m your guide through your Respiratory System! My name is, “Mr. Oxygen Molecule,” but you can call me, “Mr. O2.”


The path of oxygen in our body the story of respiration

The Path of Oxygen in Our Body:The Story of Respiration

  • Table of Contents

  • Introduction

  • Inhale

  • Mouth and Nose

  • Nasal Passage

  • Trachea

    • Epiglottis and Larynx

  • Bronchi

  • Bronchioles

    • Housecleaning the Bronchial Tubes

  • Alveoli

  • Capillaries

  • Oxygen is in the Blood!

  • Heart

  • Credits


The path of oxygen in our body1

The Path of Oxygen in Our Body

  • We all need oxygen to make the energy we need to live and grow. We get oxygen in our bodies by breathing it in. It is in the air!

  • To breathe is to respire, and the system that controls our breathing is called the Respiratory System.

  • The organs in the Respiratory System deliver the oxygen to our blood, which then is pumped to all parts of our body by the heart.

  • But, I’m getting ahead of myself. Let’s start at the beginning!


Inhale

INHALE

When we inhale, we breathe in. There are two places that air (and the oxygen in it) can get into our body:


In our mouth air is warmed and moistened

In our mouth, air is warmed and moistened.

Warm, moist air enters the rest of our body easier than cold, dry air.


Our nose helps protect us by

Our nose helps protect us by…

Mucus

Nose Hairs

Yuck!


Mucus traps

Mucus traps:

Germs

Tiny Dust Particles


Nose hair traps

Nose hair traps:

Dust

Pollen


Nasal passage

Nasal Passage

  • It is in our head behind our nose and mouth.

  • Inhaled air from the mouth & nose meet up

  • here before moving on.


Trachea also called the windpipe

Trachea(Also called the windpipe)

Stiff

Has Ridges

Bendable

You can feel the ridges on the front of your throat!

EpiglottisLarynx

Before the air travels down the trachea

toward the lungs, it passes through the


The path of oxygen in our body

Epiglottis and Larynx

  • The epiglottis covers the trachea to prevent food from entering it when we swallow.

  • The larynx (also called the voice box) is a muscle structure below the Epiglottis that sits on top of the trachea and contains vocal cords.

Birds-eye view of the Epiglottis

Larynx

Trachea


Bronchi

Bronchi

The air moves down the trachea where it branches off into two tubes, each entering one of the lungs.

Lung


Bronchioles

Bronchioles

  • As the air moves farther into the lungs, the

  • bronchial tubes get smaller and smaller.

  • These small tubes are called bronchioles.


Housecleaning the bronchial tubes

Housecleaning the Bronchial Tubes

Mucus- in the bronchial tubes

Each Cilium acts like a tiny broom

Cilia-

Tiny hairs in the bronchial tubes

Germs and dust that get past the nasal passage stick to the mucus.

Sweeps back & forth 10 times/second!

That’s 36,000 times/hour!!


The path of oxygen in our body

Alveoli(Also called Air Sacs)

  • The bronchial tubes continue to get smaller.

  • At the ends of the smallest bronchioles, the air enters air

  • sacs called alveoli.

  • The alveoli look like bunches of grapes!


The path of oxygen in our body

Alveoli

There are over 300,000,000 alveoli in each lung!

Alveoli


Capillaries

Capillaries

  • Very tiny blood vessels called capillaries

    cover each alveoli.

  • Oxygen passes through the walls of the alveoli and into the walls of the TINY capillaries.

Capillaries

Alveoli


The oxygen is in the blood

The Oxygen is in the Blood!

  • The tiny capillariesbecome larger and larger blood

  • vessels as they leave the lungs.

  • Red blood cells carry the oxygen in the blood.

  • The blood is carried in blood vessels to the heart.

Red Blood Cell

Blood Vessel


Heart

Heart

  • The heart pumps the oxygen-rich blood to all parts of the body.

  • The oxygen helps make the energy for us to live and grow…and run and play!


Credits

Credits

  • Images from:

    http://www.googleimages.com

    http://www.punchstock.com

    http://office.microsoft.com

    Inspiration Software, Inc.

    Created by Cynthia Theorin

    For the 4th Graders of

    Gaylord A. Nelson Education Center

    July, 2009


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