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.
(Redirected from Sung (Korean name)) For the Minnan Chinese surname written å¸¸, see Chang (surname), its spelling in Mandarin Pinyin. Seong, also spelled Song or Sung, is an uncommon Korean family name, a single-syllable Korean given name, as well as a common element in two-syllable Korean given names. The meaning differs based on the hanja used to write it.