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:
A second-degree burn is one that affects the outer two layers of skin. The epidermis (outer layer) and dermis (the layer underneath) both sustain injury in a second-degree burn. This type of burn may be minor or it may be more serious, depending on the size of the area burned and where on the body the burn occurs. Minor second-degree burns may be self-treated; major ones require immediate medical attention. A second-degree burn usually takes no more than a few weeks to heal. If it is a minor burn, it may not leave a noticeable scar. However, a deeper burn of this type may result in scarring or even contractures near joints.