Otolaryngology Book

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Thymus

Aka: Thymus, Thymus Gland
  1. See Also
    1. Neck Anatomy
    2. Head and Neck Anatomy
  2. Anatomy
    1. entThymusGrayBB1178.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

Thymus Gland (C0040113)

Definition (NCI_CDISC) A bi-lobed organ surrounded by a connective tissue capsule. It is located in the upper anterior portion of the chest, behind the sternum. It is composed predominantly of lymphocytes and fewer epithelial cells. Connective tissue septa separate the lobes into lobules. The lobules contain an outer portion (cortical zone) which is rich in lymphocytes and an inner portion (medullary zone) which is rich in epithelial cells. It is an organ essential for the development of the immune system. Its function is the maturation of the progenitor lymphoid cells to thymocytes and subsequently to mature T-cells. It reaches its greatest weight at puberty and subsequently begins to involute. (NCI)
Definition (NCI) A bi-lobed organ surrounded by a connective tissue capsule. It is located in the upper anterior portion of the chest, behind the sternum. It is composed predominantly of lymphocytes and fewer epithelial cells. Connective tissue septa separate the lobes into lobules. The lobules contain an outer portion (cortical zone) which is rich in lymphocytes and an inner portion (medullary zone) which is rich in epithelial cells. It is an organ essential for the development of the immune system. Its function is the maturation of the progenitor lymphoid cells to thymocytes and subsequently to mature T-cells. It reaches its greatest weight at puberty and subsequently begins to involute.
Definition (NCI_NCI-GLOSS) An organ that is part of the lymphatic system, in which T lymphocytes grow and multiply. The thymus is in the chest behind the breastbone.
Definition (MSH) 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.
Definition (CSP) single, unpaired primary lymphoid organ situated in the mediastinum; it is necessary for normal development of immunologic function early in life but by puberty it begins to involute and much of the tissue is replaced by fat.
Concepts Body Part, Organ, or Organ Component (T023)
MSH D013950
SnomedCT 9875009
HL7 THM
English Gland, Thymus, Glands, Thymus, Thymus Gland, Thymus Glands, Thymus, Thymus gland, thymus gland, thymus glands, thymus, THYMUS GLAND, Thymus gland structure, Thymus gland structure (body structure), Thymus, NOS, Reticuloendothelial System, Thymus
French Glande thymique, Thymus (glande)
Swedish Bräss
Czech thymus, tymus, brzlík
Finnish Kateenkorva
Russian TIMUS, ZOBNAIA ZHELEZA, VILOCHKOVAIA ZHELEZA, ВИЛОЧКОВАЯ ЖЕЛЕЗА, ЗОБНАЯ ЖЕЛЕЗА, ТИМУС
Japanese 胸腺
Italian Timo, Ghiandola del timo
Croatian TIMUS
Latvian Aizkrūtes dziedzeris
Polish Grasica
Norwegian Brissel, Thymus
Spanish estructura de la glándula tímica (estructura corporal), estructura de la glándula tímica, timo, Timo
German Thymus, Thymusdrüse
Dutch Thymus, Zwezerik
Portuguese Timo
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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