Describe the steps of gelatin preparation.

Gelatin is a protein-rich substance derived from collagen that is widely used in food, pharmaceutical, and cosmetic industries as a gelling agent, stabilizer, and emulsifier. Gelatin is commonly prepared from animal sources such as bones, skin, and connective tissues of cows, pigs, and fish. The preparation of gelatin involves several steps, including extraction, purification, and drying. In this response, I will describe the general steps involved in the preparation of gelatin.

1. Extraction: The first step in gelatin preparation is the extraction of collagen from animal tissues. Bones, skin, and connective tissues are the most ____ _________ ___ _________ _________ _______ ________ ____.
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