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.
Managers need an understanding of organizational behavior because a large part of their job has to do with exactly that.Organizational behavior is the study of how people behave while in groups and as individuals. Much of what a manager does has to do with trying to get people to work as effectively as possible.t is impossible to find an organization without any manpower. So, as long as organizations are consisted of individuals, it is very important to know and learn about these fundamental elements of the firms. And that is the reason the concept of organizational behavior is a major field of study these days.