Anaerobic respiration is a process that allows organisms to generate energy without using oxygen. This type of respiration occurs in environments where oxygen is scarce, such as in deep soil or in the intestines of some animals. During anaerobic respiration, glucose is broken down to produce energy, along with byproducts like lactic acid in animals or ethanol and carbon dioxide in yeast. Many microorganisms, including certain bacteria and yeast, rely on anaerobic respiration to survive. This process is essential for various applications, such as in brewing and baking, where yeast ferments sugars to create alcohol and carbon dioxide, contributing to the flavor and texture of products.