-Hemopoiesis: Red bone marrow of ribs, sternum and centra of thoracic vertebrae (make red blood cells, white blood cells and platelets) breast bone (sternum) Located anteriorly and midsagitally in thoracic cage. Parts of the sternum -Manubrium (upper part) articulates with clavicle and first pair ribs through first costal cartilages
a formula unit is the symbolic representation of an ionic compound or network solid and a molecular formula is the symbolic representation of a molecular compound see the web links and related questions links for more information
1 unit (U) is the amount of enzyme that catalyses the reaction of 1 nmol of substrate per. minute (definition B) While the definitions may vary the user can still make valid product comparisons as long as. suppliers are explicit about their unit definitions and the assay conditions employed.