The spleen is a center of activity of the mononuclear phagocyte system and can be considered analogous to a large lymph node, as its absence causes a predisposition to certain infections.he spleen is a center of activity of the mononuclear phagocyte system and can be considered analogous to a large lymph node, as its absence causes a predisposition to certain infections.
The Celtic knot symbol, is also referred to as the mystic knot, or the endless knot. The more esoteric or spiritual meaning of this symbol eludes to beginnings and endings.In viewing these beautiful knots, we cannot see a beginning or and end, and therefore we are reminded of the timeless nature of our spirit.he Celtic knot symbol, is also referred to as the mystic knot, or the endless knot. The more esoteric or spiritual meaning of this symbol eludes to beginnings and endings.
In Celtic Art, Celtic knots (also known as 'endless knots' or 'mystic knots') are series of overlappying or interwoven knots which have no clear start or end. They started to appear in Celtic Art in the second half of the 5th Century whereas Celtic spirals appeared much earlier, as early as 600 BC.eltic Knots look likes strips which wind, weave and loop their way around each other. It can be just one strand which crosses back and forth on itself. Other times it is a number of strips. True Celtic Knots do not have loose ends. Some Celtic animal symbols (called zoomorphs) show a similar type of weaving to a knot.