1 Go to the Tools menu and select Export. 2  Name the file. 3  Examples might be: AddressBook-Thunderbird or ListName-Thunderbird and choose to save it to your Desktop. 4  Change the format to: Comma Separated. 5  Click the Save button. 6  Log into gmail.rider.edu and navigate to Contacts. Go to the Tools menu and select Export. 2  Name the file. 3  Examples might be: AddressBook-Thunderbird or ListName-Thunderbird and choose to save it to your Desktop. 4  Change the format to: Comma Separated. 5  Click the Save button. 6  Log into gmail.rider.edu and navigate to Contacts.
Full Answer. In addition to two upper chambers, the heart also has two lower chambers. The lower chambers are known as the left and right ventricles, which have a primary responsibility of pumping blood out of the heart. Separating the upper and lower chambers are different valves, which control the direction and rate of blood flow. A complete circulating cycle is defined as each instance the two atria bring in blood and the ventricles pump out blood.
The heart is a four-chambered organ consisting of right and left halves. The upper two chambers, the left and right atria, are entry-points into the heart, while the lower two chambers, the left and right ventricles, are responsible for contractions that send the blood through the circulation.The circulation is split into the pulmonary and systemic circulation.he term systole is synonymous with contraction (movement or shortening) of a muscle. Electrical systole is the electrical activity that stimulates the cardiac muscle of the heart chambers to make them contract.