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Corpora Cavernosa in the Domestic Cat 
the corpus spongiosum in the greater irregularity in the shape of the 
venous spaces, and the more frequent anastomoses of the spaces with 
each other. Longitudinal sections show also that the spaces in general 
are not extended in a longitudinal direction as they are in the corpus 
spongiosum. In the crura, the amount of adipose tissue again in- 
creases slightly, forming usually a thin, imperfect peripheral layer 
(Fig. 6). At the proximal extremity the cavernous tissue of the crura 
is often very largely replaced by adipose tissue. 
, 
ur-G 
Fia. 4. Cross-section of penis of a cat through base of glans, vessels uninjected. 
x 25. Stained with osmic acid. ep, epidermis; dp, deep venous plexus; A, tunica 
albuginea; 8, septum; CC, corpus cavernosum; ur, urethra, in corpus spongiosum. 
The corpus spongiosum, it should be noted, contains only the typical 
cavernous tissue of that region. In the peripheral portion of the bulb, 
however, adipose tissue is occasionally found (cf. Fig. 6). 
The presence of adipose tissue in the corpora cavernosa as previously 
described is fairly constant, although the extent of its development 
varies somewhat in individual cases. Sometimes the adipose tissue is 
present in larger amount than indicated, and occasionally it is less well 
developed. The variation apparently does not depend upon the age of 
the animal, except during the first few weeks after birth. At birth, 
there is no trace of adipose tissue in the corpora cavernosa, which con- 
