Sweetbreads are thymus glands (called neck or throat sweetbreads) and pancreas (called heart, chest or stomach sweetbreads) of young animals, usually calf or lamb, sometimes pig. Non-muscle parts are called "offal," a play on "awful," as that's how it's pronounced in some places. | Sweetbreads are thymus glands (called neck or throat sweetbreads) and pancreas (called heart, chest or stomach sweetbreads) of young animals, usually calf or lamb, sometimes pig. Non-muscle parts are called "offal," a play on "awful," as that's how it's pronounced in some places. |