Your Breathtaking Lungs and Rocking Respiratory System
A Crabtree Publishing Company I www crabtreebooks com 1 800 387 7650
CONTENTS Cells are the smallest building blocks of all living things YOUR BREATHTAKING LUNGS 4 NOSTRILS AND MOUTH 6 JOURNEY TO THE LUNGS 8 10 THE ALVEOLUS OXYGEN EXCHANGE OXYGEN DELIVERY WASTE COLLECTION 12 Lots of cells join together to make tissue thin linings or membranes within the lungs BREATH CONTROL Tissue forms the BREATHING NOT THAT SIMPLE 16 RELAX AND BREATHE OUT 18 TD 20 THE LUNG PROTECTION SQUAD 22 Your lungs WHAT S IN A SNEEZE are the prior orgar ade of 24 Syste tem WITHOUT LUNGS YOU CAN T TALK mary 26 LUNG TROUBLE 28 MAINTENANCE AND SERVICING in your They are different types of cells and tissue BREATHTAKING WORDS BREATHLESS INFORMATION 32 INDEX The lungs work with other organs in your respiratory system to allow you to take air in and push it out of your
NOR I BREATHTAKING LUNGS PTF BOD Your lungs breathe in about 2 245 gallons 8 500 L of air every day Every minute you breathe in about 15 times even more if you are exercising The air you breathe in travels through roughly 1 243 miles 2 000 km of airways passages that carry air deep into your lungs It's an impressive set up but what is it for Why do I breathe You breathe to get air in and out of microscopic air sacs within your lungs From the outside a healthy lung looks pink and spongy You have two lungs one on each side of your chest They are surrounded Many mountain climbers carry breathing equipment containing oxygen The higher you climb the less oxygen there is in the air by rows of bones called ribs These form a protective barrier called your rib cage Air contains a mixture of gases About 20 of air consists of a gas called oxygen 4 You need a constant supply of oxygen to stay alive Your brain liver heart and other organs and muscles all need oxygen You can survive for days without water and weeks without food but you would last only a few minutes without
When the air you breathe in reaches your lungs the oxygen is removed and absorbed into your blood ready to be distributed LOOK CLOSER BREATHING SYSTEM around the rest of your body Oxygen is used to release energy from the food you eat This energy is needed by every part of your body to keep it working nostril You need to breathe for another reason too Getting energy from food creates a waste gas called carbon dioxide Breathing out rids your body of this gas mouth lung windpipe DON T TRY THIS AT HOME lun Most people can go without breathing for between 20 and 45 seconds After specialist training some people can hold their breath for MUCH longer than that In 2012 freediver Stig Severinsen set a world record by holding his breath underwater for 22 MINUTES Holding your breath for a long time without training is dangerous so really DON T try this at home liaphragm STRANGE BUT TRUE Babies start life taking 40 to 50 breaths per minute By the time they are five or six years old the number of breaths they take per minute is only about 15 That's the same as an adult V Freedivers dive down to great depths without the use of breathing
