JOURNEY THROUGH THE

RESPIRATORY SYSTEM!

Sarah Freeman 8Green

This is our oxygen cell, Lenny.

And this is Lenny up close:

Lenny is a very important cell, as he is needed by all our body cells to make energy. Every time you breathe, you take in all sorts of different molecules in the air, including Lenny. About 19% is oxygen, and the rest is mostly not needed for the body. In fact some of it is quite bad, such as carbon dioxide. But we’ll learn about that later. This PowerPoint is Lenny’s journey through the Respiratory System, an important system of the body. The next slide is about Lenny’s route, and from then on the rest of his travels.

The Oxygen Cell

Click the arrow!

The Respiratory SystemLenny is taking a very important path around the body, the Respiratory System. The respiratory system is the path that air travels through, into the lungs, to the blood and then to the heart. Lenny will be travelling through the blood stream to the rest of the body. He will go through major veins and arteries until he finally arrives at his destination.

It is the first day in my adventure through the body. I was breathed in by a little girl who was playing outside, through her mouth.

Entering the Body

Down we goNext was down the trachea, which leads to the lungs. Along with other some other oxygen molecules, I was transported down to an alveoli. I passed through its wall and through the wall of a capillary, and finally I was in the blood stream! The deoxygenated blood was being pumped by the heart. Soon the blood was oxygenated, as all of us oxygen molecules were swept into it! As I was going through, I also noticed some particularly nasty looking carbon dioxide molecules coming into the lungs, which would then be breathed out by the little girl.

Through the BloodstreamA red blood cell picked me up as I passed through the capillary stream. He took me to the heart, which pushed us around the body. The blood cell, whose name was Bob, told me I was to be taken to a cell in the leg, which needed energy to keep the girl walking. We got chatting, and Bob told me he would pick up any waste produced by cells on his way back to the lungs, so it could be breathed out. It was his job to drop me off. Bob told me we were travelling through an artery, and he would return through a vein. I thought this was all very interesting.

Me with Bob!

Click to zoom

Energy HitI parted with Bob at my destination, a cell in the little girls leg. I was needed so the cell could produce energy. There was already a glucose molecule and some water waiting for me. All I needed to do was join with the glucose and water and we would form energy. We did and... BAM! The cell had energy. Well, and a slight problem. Carbon dioxide.

Carbon Dioxide

Water

Glucose

ENERGY!

• Respiratory System- introduces oxygen and other gasses into the body. The oxygen is absorbed into the blood system and then taken all over the body.

• Energy- is needed by all the body’s cells to function. It is produced by glucose, oxygen and water. Energy is used by all the cells for their individual role, e.g. A nose cell needs energy to produce more mucus.

• Trachea- is also called the windpipe. It is the tube that runs from the nose down to the lungs and the tube which oxygen and other gasses run through.

• Alveoli- the alveoli are little clusters inside the lungs, which is flattened out, could cover a tennis court. The alveoli wall is one cell thick which allows oxygen to pass through into the capillaries.

• Carbon dioxide- is a natural gas which is harmful to the body, as it contains carbon. This is why any waste made by the cells and any carbon dioxide is quickly transported out of the body.

Glossary

Rid of the NastiesI have been broken into a carbon dioxide molecule! Partly, anyway. Now that the cell had its energy, the blood stream had to quickly transport any carbon dioxide and waste out of the body. I was picked up by another red blood cell (this time, named Sally) who had to take me back to the lungs. The girl needed to breathe me out, and the body wanted me out quickly! I passed through the capillary wall back into alveoli. The blood would then return to the heart which would pump it back into the lungs. This big cycle is the Respiratory System.

Out we come!Suddenly, WOOSH! The girl exhaled, and along with other carbon dioxide molecules, I was swept out and back into the air. What a journey!

The Respiratory SystemThat’s the end of Lenny’s journey! Basically, the Respiratory system transports gasses in and out of the Circulatory system, which then takes those vital gasses to everywhere they need to go. Oxygen is breathed into the lungs and into a little alveoli. Inside the alveoli, blood filters in through the pulmonary vein which travels to the heart. The heart pushes the now oxygenated blood around the rest of the body.

Thank you for watching!For more information on the Respiratory System, visit

http://en.wikipedia.org/wiki/Respiratory_system .

Sarah Freeman 8Green

http://wiki.answers.com/Q/What_is_the_path_of_oxygen_from_outside_the_body_to_the_bloodstream

http://en.wikipedia.org/wiki/Respiratory_system

http://medialibrary.stanford.edu/medias///resp.anatomy-intro.jpg

http://migabuat.files.wordpress.com/2006/04/circulatory_systemL.gif

http://www2.estrellamountain.edu/faculty/farabee/biobk/biobookrespsys.html

http://www.h2owtt.com/wttpage51-2.html

http://en.wikipedia.org/wiki/Carbon_dioxide

http://en.wikipedia.org/wiki/Respiratory_system

http://pennstatehershey.adam.com/graphics/images/en/19192.jpg

Sources