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.
A gizzard is a part of a birdâs stomach. The gizzardâs walls are thick and made up of muscle. When a bird eats, the food goes through the esophagus and into the crop (a pouch-like structure). From the crop, food enters the first part of the stomach, called the proventriculus, and the process of digestion begins. The gizzard contains grit, sand or small stones and is the second part of a birdâs stomach. These small stones pulverize food. Interestingly, all birds have gizzards, some insects and reptiles also have them.