The singular seraph is a back-formation from the plural seraphim, whereas in Hebrew the singular is saraph. Tradition places seraphim in the highest rank in the Christian angelic hierarchy and in the fifth rank of ten in the Jewish angelic hierarchy. A seminal passage in the Book of Isaiah (Isaiah 6:1-8) used the term to describe six-winged beings that fly around the Throne of God crying holy, holy, holy.
Slough is defined as yellow devitalized tissue, that can be stringy or thick and adherent on the tissue bed. This wound bed has both yellow stringy slough as well as thick adherent slough. Slough on a wound bed should be surgically debrided to allow for ingrowth of healthy granulation tissue.
Bone is a connective tissue that is characterized by a mineralized extracellular matrix. The matrix is secreted by cells called osteocytes. It consists mostly of mineralized collagen fibres arranged in lamellae. What little ground substance is present is also mineralized.onnective tissue is the most diverse of the four tissue types with a wide variety of functions. It ranges in consistency from the gel-like softness of areolar connective tissue to the hardness of bone. Blood is also a connective tissue.