We developed Natural Earth as a convenient resource for making custom maps. Unlike other map data intended for scientific analysis or military mapping, Natural Earth is designed to meet the needs of production cartographers using a variety of software applications. Maximum flexibility is a goal. Natural Earth Vector comes in ESRI shapefile format, the de facto standard for vector geodata.
A gizzard is a sack like organ at the back of the earthworms throat. The gizzard basically chews the earthworm's food since the worm doesn't have any teeth. The crop is a thin â¦ ner organ closer to the head. The crop stores food.
You will find two structures close to the clitellum. First in the order is the crop, followed by the gizzard. The gizzard leads to the intestine, which is as long as the worm and ends at the anus. Solid wastes exit the earthworm at the anus; however, liquid wastes leave each segment through the nephridia.