The importance to the genito-urinary surgeon of a due appreciation of the pathological changes underlying a sound system of therapeutics, of that portion of the urinary canal called the posterior or prostatic urethra, and surrounded by that composite body called the prostate gland, must be my apology for entering into a consideration of its minute anatomy with considerable detail.
Anatomy.—The prostate gland, or more properly speaking the prostate muscle, is a composite organ composed of unstriped muscular, fibrous, elastic, connective, glandular, nerve, vascular, lymphatic, and a small amount of striped muscular tissue. It resembles a truncated cone in shape; its base surrounding the neck of the bladder, its apex terminating at the membranous urethra, from which it is separated by the posterior or deep layer of the triangular fascia or triangular ligament.…
Wilson AH. The Prostate Gland: A Review of its Anatomy, Pathology, and Treatment. JAMA. 2014;312(5):562. doi:10.1001/jama.2013.279650