MICROANATOMY

Detailed explanation-1: -Thymus. The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus.

Detailed explanation-2: -[1] The thymus is the organ primarily responsible for the production and maturation of immune cells; including small lymphocytes that protect the body against foreign antigens. The thymus is the source of cells that will live in the lymphoid tissues and supports their maturation and proper function.

Detailed explanation-3: -The thymus gland is in the chest, between the lungs and behind the breastbone or sternum. It is just in front of and above the heart. The thymus makes white blood cells called T lymphocytes. These are also called T cells.

Detailed explanation-4: -Enlarge. Anatomy of the thymus gland. The thymus gland is a small organ that lies in the upper chest under the breastbone. It makes white blood cells, called lymphocytes, which protect the body against infections.

Detailed explanation-5: -Answer and Explanation: The correct answer is mediastinum. It is one of the divisions of the thoracic cavity and contains the heart, thymus gland, lymph, blood vessels, trachea, esophagus, and nerves. The mediastinum can be further divided into the superior, anterior, middle and posterior parts.