Endoskeleton three phyla and one subclass of animals, endoskeletons of various complexity are found: Chordata, Echinodermata, Porifera, and Coleoidea. An endoskeleton may function purely for support (as in the case of sponges), but often serves as an attachment site for muscle and a mechanism for transmitting muscular forces. A true endoskeleton is derived from mesodermal tissue. Such a skeleton is present in echinoderms and chordates. The poriferan 'skeleton' consists of microscopic calcareous or siliceous spicules or a spongin network. The Coleoidae do not have a true endoskeleton in the evolutionary sense; there, a mollusk exoskeleton evolved into several sorts of internal
Han Chinese subgroups is Hakka. In Hong Kong, a majority of the population are Cantonese. According to the CIA World Factbook, 89% of Hong Kongers speak the Cantonese language. Other Han Chinese peoples present in Hong Kong include the Hakka, Hoklo, Teochew and Shanghainese. According to the CIA World Factbook, 85.7% of Macanese speak Cantonese. The term "Macanese people" or Macanese of mixed Cantonese and Portuguese descent. Han Chinese subgroups The sub groups of the Han Chinese people, also known as Sinitic peoples, Chinese dialect groups or just dialect groups, are defined based on linguistic, cultural, genetic, and regional features. The terminology used