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.
Answered by The Community. Making the world better, one answer at a time. osteons are the structural units of compact bone and therefore located in compact bone. essentially an osteon is hollow tube consisting of ring like structures called lamellae similar to rings of a tree. within the lamellae are lacunae.