Unlike the other organs in the digestive system, the mouth, the pharynx, and the portion of the esophagus that is above the diaphragm are not lined with serosa. Rather, they are lined with a different layer of fibrous tissue called the adventitia.
The BowTie Method. A BowTie is a diagram that visualizes the risk you are dealing with in just one, easy to understand picture. The diagram is shaped like a bow tie, creating a clear differentiation between proactive and reactive risk management. The power of a BowTieXP diagram is that it gives you an overview of multiple plausible scenarios, in a single picture.
Another common trouble spot is the bow tie, a network in which many players are dependent on a single employee but not on each other. Individuals at the center knot of a bow tie have tremendous power and control within the network, much more than would be granted them on a formal organizational chart.