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Laboratory 42. The Male Perineum and the Penis
Step 8. The Cross-Section of the Penis

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Make a transverse section through the mid portion of the penis and identify the corpus spongiosum, which surrounds the urethra, and the two corpora cavernosa , which are separated by a septum of tunica albuginea. Observe the nature of the erectile tissue.

Links and References:
Grant's: 3.67
Netter (1ed.): 359 (2ed.): 355
Rohen/Yokochi: 326