Segmentation is a division in animals that have a series of common repetitive segments or body parts. Segmentation of the body plan is important for allowing different regions of the body to develop differentially for different uses. Segmentation in animals typically falls into three types characteristic of the different phyla: Arthropoda, Vertebra, and Annelida. In the picture above, there is a fly on the net. A fly has segmented body parts, so it would be in this category.