Ducks belong to birds. Duck kidney and duck stomach are the same organ on it. Duck gizzards are muscular stomachs of ducks. Duck kidney is oblate in shape, dense in meat, tough and chewy, long in taste and free from greasy feeling. The main nutritional components of duck gizzards are carbohydrates, protein, fat, nicotinic acid, vitamins and minerals such as calcium and magnesium.
The stomach of birds is divided into glandular stomach and muscular stomach. The glandular stomach wall is thin, and the parietal cells secrete gastric acid and various digestive enzymes for soaking and digesting food; Muscle stomach has a well-developed muscle wall, the inner wall is covered with a hard horny membrane, and the inner cavity contains some small sand grains (swallowed by birds), which act like teeth and are used to grind food.
Extended data
Tips for buying duck gizzards:
Fresh duck gizzards are purple or red in appearance, with elastic and shiny surface and thick texture. The stale duck gizzard is dark red, the surface is inelastic and shiny, and the meat is soft.
If you buy frozen duck gizzards at home, you can store them directly in the freezer. If they are fresh, they should not be kept for a long time. Better eat them as soon as possible. If you need to keep it fresh for a few days, you can clean the duck gizzard, add cooking wine and a little salt, mix well, wrap it in a fresh-keeping bag and put it in the refrigerator.
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