Maslow's hierarchy of needs Physiological Level
When a person is missing a physiological need, the body will naturally want the missing need. Humans are not fully aware of all of their physiological needs. But, we are very alert about some of our other physiological needs. Needs on the physiological level are the most important. If these needs are not met then it will be difficult to achieve higher level needs. Some people mistake other needs for physiological needs. For example, a person who is lonely may turn to food. They may believe that the food will fulfill their need for love. In simple creatures such as rodents, physiological needs may be the only needs that have to be met. However, in humans this is the only the base of the hierarchy. After physiological needs are met, there are four higher levels in the hierarchy.