There is a phase when the early embryo consists only of simple epithelial layers. Later, the three primitive germ layers give rise to 4 primary tissues: 1. Epithelium  the cells are generally applied closely one to another with little cementing substance.
See also: Confucius and Gong (surname) Kong (å­, /ËkoÊÅ/) is a Chinese and Korean surname. It can also be written as Kung in Taiwan, Hung in Hong Kong, Khá»ng in Vietnam, and Gong in Korea. There are around 2.1 million people with this surname in China in 2002, representing 0.23% of the population.
So, the Chinese term for a Chinese person is zhongguo ren - China person or, more exactly, middle-country person. Chinese also call themselves the Han people or Tang people. This is especially the case for overseas Chinese.Han and Tang are two high points in the Chinese history.o, the Chinese term for a Chinese person is zhongguo ren - China person or, more exactly, middle-country person. Chinese also call themselves the Han people or Tang people. This is especially the case for overseas Chinese.