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7 - E-Lib FK UWKS

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2<br />

26<br />

Fig. 2.3.2. a Three-dimensional model of the male lower urinary<br />

tract. b Transverse section through the external urethral<br />

sphincter system of a 56-year-old male. c Frontal section of a<br />

7 year old male. Muscle tissue is red and connective tissue is<br />

blue–green in the histological sections (Crossmon staining). The<br />

external urethral sphincter is composed of a strongly developed<br />

Chapter 2.3 J.-U. Stolzenburg et al.<br />

striated part (star) and a thinner smooth muscular part (dot).<br />

There is no muscular connection to the pelvic floor musculature.<br />

bl, Bladder; vs, vesical sphincter; p, prostate; us, urethral<br />

sphincter (striated part); dm, detrusor muscle; la, levator ani; lm,<br />

longitudinal muscle system; ct, connective tissue; ul, urethral lumen;<br />

bp, bulb of penis; star, striated; dot, smooth

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