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Renal pelvic, ureter, urinary bladder. Their structure, topography, blood and nerve supply, lymphatic drainage

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There’re superior and inferior calyx, they merge in renal sinus to form a renal pelvis. Renal pelvis enlarged upper end of ureter, the tube through which urine flows from kidney to urinary bladder. Ureter – is tube about 30sm. Structure: In ureter are distinguished: an abdominal part, then a pelvic part located in true pelvis. The walls of ureter like walls of renal pelvis, consists of 3 coats: outer connective tissue – adventitious coat; inner – mucous coat; and middle – muscular coat.

Blood supply of renal pelvis and ureter: renal artery, testicular (ovarian) artery, middle part of ureter – supplied by common iliac artery; pelvic part of ureter supplied by middle rectal and inferior vesical arteries. Venous blood: internal iliac vein, renal vein, testicular (ovarian) veins. Lymphatic drainage: lumbar and iliac lymph nodes. Nerve supply: nerves are of sympathetic origin: run to upper part from renal plexus, to abdominal part from ureteric plexus, to pelvic part from inferior hypogastric plexus.

Urinary bladder – lies in cavity of true pelvis behind pubic symphysis, posteriorly separated from rectum by seminal vesicles, the terminal parts of ductus deferens in males and by vagina in females. A filled bladder is egg-shaped; wider part is the base (fundus vesicae), is continuous with urethra by means of neck (cervix vesicae); also present apex of bladder. The middle part between apex and base is called body of bladder. There’re present coats: 1) serous coat; 2) muscular coat; 3) submucous coat; 4) mucous coat. Three strata are in muscular coat: stratum externum, medium and internum. Blood supply: inferior and superior vesical arteries, middle rectal artery. Veins partly drains into vesical venous plexus and partly into iliac vein. Lymph: internal iliac lymph nodes. Nerves from inferior vesical plexus.

 

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