part_of part of part of Homo sapiens theca cell layer thecal cell layer EMAPA:35636 theca of follicle theca folliculi The theca folliculi are responsible for the production of testosterone from androstenedione in females, and indirectly the production of estrogens by supplying the neighboring granulosa cells with androstenedione that can then be used as a substrate for aromatase. [Wikipedia:Theca_of_follicle] ZFA:0001113 FMA:18656 MA:0001712 TAO:0001113 ovary theca EFO:0003629 BTO:0002853 layer of theca cells UBERON:0000155 A layer of the ovarian follicle that consists of theca cells. thecal cell layers Wikipedia:Theca_of_follicle ovarian theca theca cell layer of ovarian follicle SCTID:361385000 multicellular organism reproductive system zebrafish component