Term Name:	medullary ray
Synonyms:	Ferrein's pyramid, kidney medullary ray, renal medullary ray
Definition:	A renal, cortical lobule, consisting of the ascending or descending limbs of the loop of Henle or of the collecting tubules; medullary rays are regions where parallel arrays of straight tubules travel perpendicular to the capsule and extend from the cortex to the medulla.
Ontology:	Cell Ontology [UBERON:0009883]