64. Anatomy of Testis | Layers, Blood Supply, Clinical Pearls | NEET PG, USMLE, FMGE Must-Know 💯

𝐒𝐮𝐛𝐬𝐜𝐫𝐢𝐛𝐞 𝗙𝐨𝐫 𝗠𝐨𝐫𝐞 𝗜𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 𝐨𝐧 𝗛𝐞𝐚𝐥𝐭𝐡 👩‍⚕‍ 𝐚𝐧𝐝 𝗠𝐞𝐝𝐢𝐜𝐢𝐧𝐞💉🩺💊
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Anatomy of Testis | Layers, Blood Supply, Clinical Pearls | NEET PG, USMLE, FMGE Must-Know 💯

The testis is an ovoid male gonad located within the scrotum, playing a key role in spermatogenesis and testosterone production 🧬🧠. Each testis is suspended by the spermatic cord and covered by three concentric layers derived from the abdominal wall: tunica vaginalis (serous layer), tunica albuginea (fibrous capsule), and tunica vasculosa (vascular inner layer) 🩻. Internally, the testis is divided into 200–300 lobules, each containing 1–4 seminiferous tubules, where sperm formation begins. The tubules converge into straight tubules, draining into the rete testis, and then through efferent ductules into the epididymis. Arterial supply comes from the testicular artery (a branch of the abdominal aorta), while venous drainage occurs via the pampiniform plexus, which helps in thermoregulation ❄️🔥. Lymphatic drainage goes to para-aortic nodes, and not inguinal nodes—an important clinical distinction for cancer staging 🎯. Nerve supply is autonomic via the testicular plexus. Clinically, knowledge of testicular anatomy is crucial in conditions like torsion, hydrocele, varicocele, cryptorchidism, and testicular tumors.

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