Best Answer: In order for air to enter the lungs 2 things must happen. 1. The diaphragm must contract. This increases the volume ofthe thoracic cavity. 2. The intercostal muscles (rib muscles) will pull he ribs up and outward also increasing the cavity's volume. Bothe of these will decrease the pressure inside the cavity and air will rush in from the outside.
The Ming dynasty (1368â1644), founded by the peasant rebel leader Zhu Yuanzhang (known posthumously as Emperor Taizu), was an imperial dynasty of China. It was the successor to the Yuan dynasty and the predecessor of the short-lived Shun dynasty, which was in turn succeeded by the Qing dynasty. Scholars have traditionally divided Ming history into three distinct periods: Early (1368â1436), Middle (1436â1573), and Late (1573â1644).
Ruling China at the beginning of the early modern period, the Ming Dynasty was âone of the greatest eras of orderly government and social stability in human historyâ. By the 16th century the Ming economy was stimulated by trade with the Portuguese, the Spanish, and the Dutch.n the early modern period, the Holy Roman Empire was a union of territories in Central Europe under a Holy Roman Emperor. The first emperor of the Holy Roman Empire was Otto I. The last was Francis II, who abdicated and dissolved the Empire in 1806 during the Napoleonic Wars.