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The testes and epididymis are paired structures, located within the scrotum. The testes are the site of sperm production and hormone synthesis, while the epididymis has a role in the storage of sperm. In this article, we shall look at the anatomy of the testes and epididymis – their structure, vasculature, innervation and clinical correlations. This is an article covering the anatomy of testicles including definition, diagram and functions. Learn all about this topic at Kenhub now! Anatomy of the Epididymis The epididymis is 5–10 mm thick and extends from the upper to the caudal pole of the testis. The epididymis can be divided into caput, corpus, and cauda. A thin capsule and the serosa of the tunica vaginalis cover the epididymis. 8–10 efferent ducts transport the sperm from the rete testis into the epididymal duct (ductus epididymidis). The epididymis consists mostly of the coiled epididymal duct, which passes into the ductus deferens at the cauda of the ... A testicle or testis is the gonad in males that produces sperm and testosterone. Learn about its structure, development, blood supply, and disorders from this comprehensive article.