The following table summarizes the different parts of the Male Urethra
Features | Prostatic part | Membranous part | Spongy part |
Location | Within prostate | Within urogenital diaphragm | Within penis (corpus spongiosum) |
Length | 3 cm | 1.5–2 cm | 15 cm |
Shape in cross section | Horseshoe shaped | Star-shaped | In the bulb—trapezoid In the body—transverse slit At external urethral orifice—vertical slit |
Diameter and dilatability | Widest and most dilatable | Narrowest and least dilatable | Mostly uniform diameter with medium dilatation |
Openings | • Prostatic utricle • Ejaculatory ducts • Prostatic glands | Minute mucous glands | Urethral glands (Littre’s glands |
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