Erythropoiesis = formation of erythrocytes. 1  the body must produce about 2.5 million new RBCs every second. 2  in adults, erythropoiesis occurs mainly in the marrow of the sternum, ribs, vertebral processes, and skull bones. 3  begins with a cell called a hemocytoblast or stem cell (below)  rate is regulated by oxygen levels:
1 Second Intention Healing â A wound that is extensive and involves considerable tissue loss, and in which the edges cannot be brought together heals in this manner. 2  This is how pressure ulcers heal. 3  Secondary intention healing differs from primary intention healing in three ways:
Wounds that heal by tertiary intention require more connective tissue (scar tissue) than wounds that heal by secondary intention. An example of a wound healing by tertiary intention is an abdominal wound that is initially left open to allow for drainage but is later closed. Promoting Wound Healing. Any type of wound undergoes considerable stress while in the healing process.