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𝐒𝐮𝐛𝐬𝐜𝐫𝐢𝐛𝐞 𝗙𝐨𝐫 𝗠𝐨𝐫𝐞 𝗜𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 𝐨𝐧 𝗛𝐞𝐚𝐥𝐭𝐡 👩⚕ 𝐚𝐧𝐝 𝗠𝐞𝐝𝐢𝐜𝐢𝐧𝐞💉🩺💊 📌𝗜𝗻𝘀𝘁𝗮𝗴𝗿𝗮𝗺 : / clinical.learning Vaginal Anatomy Simplified 🩺 | Layers, Relations & Blood Supply for NEET PG & MBBS Exams The vagina is a fibromuscular canal that serves as a passage between the external genitalia and the uterus, playing critical roles in menstruation, intercourse, and childbirth. It is approximately 7–9 cm in length, extending from the vestibule of the vulva to the external os of the cervix. Anatomically, it lies posterior to the urinary bladder and urethra, and anterior to the rectum. It is directed superiorly and posteriorly, forming a 45-degree angle with the horizontal in the standing position. The vagina surrounds the cervix, forming the anterior, posterior, and two lateral fornices, with the posterior fornix being the deepest — a clinically important site for culdocentesis. The wall of the vagina consists of three layers: an inner mucosal layer with stratified squamous non-keratinized epithelium, a muscular layer (outer longitudinal and inner circular smooth muscle), and an outer adventitial layer containing blood vessels and connective tissue. Notably, it has no glands of its own, and its lubrication is derived from cervical mucus and transudate from the vaginal wall. The vaginal blood supply is primarily from the vaginal branch of the uterine artery, internal pudendal, and middle rectal arteries, with venous drainage into the internal iliac vein. Lymphatic drainage follows a regional pattern: the upper third drains to the internal iliac nodes, the middle third to sacral nodes, and the lower third to superficial inguinal nodes — making it highly relevant in staging gynecological malignancies. Nerve supply is both autonomic and somatic. The lower 1/5th of the vagina (below the hymen) is somatically innervated by the pudendal nerve, making it pain-sensitive, while the upper part is autonomically innervated and relatively insensitive to pain — which is crucial during procedures like childbirth and gynecological surgeries. The vagina is supported by surrounding pelvic floor muscles, cardinal ligaments, and the levator ani, preventing prolapse and maintaining reproductive health. #VaginaAnatomy #GynecologyLecture #MBBSAnatomy #NEETPG2025 #USMLEAnatomy #FMGEPreparation #PelvicAnatomy #MedicalLecture #ReproductiveSystem #PudendalNerve #FornixAnatomy #FemalePelvis #YouTubeAnatomyLecture #ClinicalAnatomy #VaginalWallLayers