HOW BREATHING WORKS ? TalatiExamPaper
You breathe every minute of the day, without even thinking about it. Without breathing, humans (and animals) can’t survive. (HOW BREATHING WORKS ?)
- The Lungs
Your lungs take up most of the space in your chest, and they do most of the work when it comes to breathing. Lungs are pink and a bit squishy. They’re protected by your ribs, which circle around your lungs to keep them safe. Under your lungs is your diaphragm, a muscle that helps your lungs inhale (breathe in) air and exhale (breathe the air out).
When you breathe in through your mouth or nose, air is pushed down your windpipe and into tubes that lead to your lungs. At the bottom of your trachea
(windpipe), there are two large tubes called bronchi. One leads to the left lung, while the other leads to the right lung. These branch into smaller and smaller
tubes, the smallest of which are called bronchioles. Bronchioles are as thin as a strand of hair, and there are about 30,000 of them in each lung. At the end
of each bronchiole are small air sacs called alveoli. The alveoli have extremely thin cell walls that allow oxygen to pass to your red blood cells. There are about
600 million alveoli in your body. Oxygen is then sent through the blood cells to all parts of your body, where it gives energy to your cells. Cells need energy to
survive and to perform basic jobs.
Ultimately, if you follow the guidelines laid out in the early parts of this book, and design your pages for people, not search engines, you’ll rank well in Google. You may need to tweak some of the inner workings of your site — keywords, links, meta tags — and you’ll need to be patient. But given time, your ranking with Google will occur naturally. Then all you have to do is continue improving your offerings for customers and stay on top of maintaining your site, and you should see your ranking climb gradually.
We covered breathing in, so what happens when you breathe out? Here’s the deal: After your cells use oxygen, your blood is carrying a gas called carbon dioxide, along with other wastes that must leave your body. The waste enters the alveoli, goes in through the bronchioles, out the bronchi, out the trachea (windpipe), and you finally breathe it out through your mouth or nose. It’s basically just inhaling, but in reverse!
So if you want to successfully rank on the Google search engine, you should follow the guidelines that are laid out in Google’s Webmaster Central (http://www.google.com/intl/en/webmasters/). There is also a set of tools available in Webmaster Central that allows you to analyze and add to your site to help make it more Google-friendly. Those tools include the following:.
Site Status Wizard: Determines if your site is currently being indexed by Google.
Webmaster Tools: This is a set of tools designed to help you improve the indexing and ranking of your site. You can also find the Google Sitemap Generator here.
Content Submission Tools: Use these to submit your site to Google, or to add products to Google Base or content to Google Book Search.
Google’s Webmaster Blog: Find tips and strategies for ranking well in Google on this blog. You’ll also find changes to the Google algorithm and other information that you’ll need to stay on top of your site rankings.
Webmaster Discussion Groups: Talk to others about what they’re doing to improve their Google rankings.
Webmaster Help Center: If you don’t understand something about Webmaster Central, here’s where you’ll find an explanation.