Even the smell of food can generate saliva, which is secreted by the salivary glands in the mouth, contains an enzyme, salivary amylase, which breaks down starch. Teeth, which are part of the skeletal system, play a key role in digestion. In carnivores, teeth are designed for killing and breaking down meat.eferences to the digestive system can be traced back to the ancient Egyptians. Some milestones in the study of the gastrointestinal system include: 1  Claudius Galen (circa 130-200) lived at the end of the ancient Greek period and reviewed the teachings of Hippocrates and other Greek doctors.
DEFINITION of 'Organizational Behavior-OB'. Organizational Behavior (OB) is the study of the way people interact within groups. Normally this study is applied in an attempt to create more efficient business organizations.
What is an 'Organizational Chart'. An organizational chart is a diagram that outlines the internal structure of a company. An organizational chart is the most common visual depiction of how an organization is structured. It outlines the roles, responsibilities and relationships between individuals within an organization.