MeSH concepts are meanings. Many MeSH concepts contain synonymous terms. meshv:Concept identifiers begin with 'M' such as M0000013, 'Congenital Abnormalities'. more types...
"The male gonad containing two functional parts: the SEMINIFEROUS TUBULES for the production and transport of male germ cells (SPERMATOGENESIS) and the interstitial compartment containing LEYDIG CELLS that produce ANDROGENS."
