How our heart work?

Answer 1

Please use your text, study materials, and/or a good search engine or two to find your answers.

1. Go to http://www.google.com or http://www.bing.com

2. Type in how the heart works (or whatever search terms you need). Press Enter.

3. Read different search results until you find what you need.

4. Re-search with different search terms if you don't find all you need.