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.
gizzard-thick-walled muscular pouch below the crop in many birds and reptiles for grinding food. gastric mill, ventriculus. pouch, pocket - (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican).lso called ventriculus. the thick-walled, muscular lower stomach of many birds and reptiles that grinds partially digested food, often with the aid of ingested gravel. 2. a similar structure in the foregut of arthropods and annelids, often lined with chitin and small teeth.