Preferred Label : medulla of thymus;
Uberon definition : Medullary portion of thymus. The reticulum is coarser than in the cortex, the lymphoid
cells are relatively fewer in number, and there are found peculiar nest-like bodies,
the concentric corpuscles of Hassall. These concentric corpuscles are composed of
a central mass, consisting of one or more granular cells, and of a capsule formed
of epithelioid cells. They are the remains of the epithelial tubes, which grow out
from the third branchial pouches of the embryo to form the thymus. Each follicle is
surrounded by a vascular plexus, from which vessels pass into the interior, and radiate
from the periphery toward the center, forming a second zone just within the margin
of the medullary portion. In the center of the medullary portion there are very few
vessels, and they are of minute size.;
Uberon synonym : medulla of thymus gland; thymus medulla; thymus gland medulla;
Origin ID : 0002124;
UMLS CUI : C0229949;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- has part
- part of
Medullary portion of thymus. The reticulum is coarser than in the cortex, the lymphoid
cells are relatively fewer in number, and there are found peculiar nest-like bodies,
the concentric corpuscles of Hassall. These concentric corpuscles are composed of
a central mass, consisting of one or more granular cells, and of a capsule formed
of epithelioid cells. They are the remains of the epithelial tubes, which grow out
from the third branchial pouches of the embryo to form the thymus. Each follicle is
surrounded by a vascular plexus, from which vessels pass into the interior, and radiate
from the periphery toward the center, forming a second zone just within the margin
of the medullary portion. In the center of the medullary portion there are very few
vessels, and they are of minute size.
