Gastrointestinal: Adjective referring collectively to the stomach and small and large intestines. The commonly used abbreviation for gastrointestinal is GI. (Outside of medicine, GI can also stand for galvanized iron, general issue or government issue-as in GI Joe).
Before the extracellular matrix is calcified, the tissue is called osteoid (bone-like) tissue. When the concentrations of calcium and phosphate ions rise high enough, they are deposited into the extracellular matrix, and the bone calcifies.
The nucleoid is the region of a prokaryotic cell that houses the primary DNA. This lesson briefly discusses the nucleoid and its characteristics, and how it compares to the nucleus of the eukaryotic cell.s the cells grow, the DNA in the nucleoid may extend into the cytosol, or cellular fluid. The nucleoid region may also contain proteins, enzymes, which are biological catalysts, and RNA. These proteins are necessary for several processes that take place in this region.