Tour 2025 Ultimobranchial Body. Occasionally found in thyroid tissue as heterotopic cartilage, thymus or solid cell nests representing ultimobranchial body remnants In humans, the ultimobranchial body is an embryological structure that gives rise to the calcitonin.
Hence, it is called ultimobranchial body. The ultimobranchial body or gland is a small organ found in the neck region of many animals.