Thymus Gland

A single, unpaired primary lymphoid organ situated in the MEDIASTINUM, extending superiorly into the neck to the lower edge of the THYROID GLAND and inferiorly to the fourth costal cartilage. It is necessary for normal development of immunologic function early in life. By puberty, it begins to involute and much of the tissue is replaced by fat.

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Tree Number(s): A10.549.750, A15.382.520.604.750

MeSH Unique ID: D013950

Entry Terms:

• Gland, Thymus
• Glands, Thymus
• Thymus Glands
• Thymus

See Also:

• Bursa of Fabricius
• Thymectomy

All MeSH Categories
Anatomy Category
Tissues
Lymphoid Tissue
Thymus Gland

All MeSH Categories
Anatomy Category
Hemic and Immune Systems
Immune System
Lymphatic System
Lymphoid Tissue
Thymus Gland