part_of starts_at ends_at pelvic urethra of male ventral epithelial bud of male anatomical_structure The ventral epithelial bud of male (veb) (TS:24-TS:26) is part of urethra of male, part of the pelvic urethra of male. Epithelial glands that bud from the pelvic urethra of male, develop from the cloacal endoderm-derived epithelium located in the ventral, anterior pelvic urethra, close to the bladder neck. In male mice, these buds represent both anterior male urethral gland buds and ventral prostate buds, which will develop into male urethral glands and ventral prostate glands respectively (TS:27). These two gland types are grouped together because, during development, urethral and prostate glands cannot be distinguished from each other and both express the same markers, such as the early prostate marker, Nkx3-1. Edar and Wnt10b mRNA staining intensity can be used to separate prostatic gland buds (High Edar and Wnt10b mRNA expression) from urethral gland buds (Low to not detectable Edar and Wnt10b mRNA) in male mice during development. By TS:27 (birth), ventral prostate buds can be distinguished from male urethral gland buds as they are longer, having started to enlongate, and are seen in two lateral rows, with the smaller, shorter male urethral gland buds present medially and not aligned into rows. Ventral prostate bud is also part of the prostate bud (TS:24-TS:26, part of prostate gland) and becomes ventral prostate gland (TS:27). Anterior male urethral gland buds become urethral gland of male pelvic urethra (TS:27). EMAPA:36135 TS24 TS26