Human body as multicellular organisms which reside in the gastrointestinal tract and on the skin. Not all parts of the body are made from cells. Cells sit in an extracellular matrix that consists of proteins such as collagen, surrounded by extracellular fluids. Of the 70 kg weight of an average human body, nearly 25 kg is non-human cells or non-cellular material such as bone and connective tissue. Cells in the body function because of DNA. DNA sits within the nucleus of a cell. Here, parts of DNA are copied and sent to the body of the cell via RNA. The RNA is
Body-to-body communication Body-to-body communication Body-to-body communication is a way of communicating with others through the use of nonverbal communication, or without using speech or verbalization. It can include "body language", facial expressions, and other bodily gestures in order to communicate with others without the need of verbal communication. Body-to-body communication accounts for postures, body language, positioning in the environment, nonverbal language, gestures, movements and in general the people as a whole. This form of communication accounts for roughly up to sixty percent of human conversation and can be expressed in many different forms. Body-to-body communication can be used in collaboration with, as