The pulmonary artery carries blood from the heart to the lungs, where it receives oxygen. It is unique because the blood in it is not oxygenated, as it has not yet passed through the lungs. The other unique artery is the umbilical artery, which carries deoxygenated blood from a fetus to its mother]. Arteries have a higher blood pressure than other parts of the circulatory system. The pressure in arteries varies during the cardiac cycle. It is highest when the heart contracts and lowest when heart relaxes.
This is also the day of the festival's first bull run. In Spanish, the running of the bulls is called San Fermin or San Fermines. A History of the Bull Run. Starting in 1324, Pamplona organized an annual festival to honour the city's patron saint: Saint Fermin.
Running of the Bulls History. Few foreigners who actually dare run with the bulls know the rich history surrounding this deadly event. The history of Spain's bull run can be traced back over a thousand years when wild bulls migrated across Spain. It All Started with the Arabs. For students of Spanish history, you may know that starting in the 8th century A.D. most of Spain was held by the Moors (Arabs from North Africa).