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).
During the late period of the Ming period, the government was weak and the throne was in danger. Not only was there an uprising by Han people, there were also invasions of the Mongolians from the North and the Manchus from the Northeast.After much struggle, the dynasty collapsed and the Manchus succeeded in ruling China and founded the Qing dynasty.he early Qing emperors were very capable and intelligent. Emperor Kangxi (the second emperor of Qing dynasty) was a capable leader and administrator.