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D fj;dljdfpdfj j ld;d jd;j d;ljfdljf’;jf;dlbjdf;lj b; j ;fj ;lg jf;’g’jdfsjg gsj dfsj fds’j; j; ;ldjsf jdfjs jdls;fjsd with any other bodily attribute, the length and girth of the penis can be highly variable between individuals of the same species. In many animals, especially mammals, the size of a flaccid penis is smaller than its erect size.
A bone called the baculum or os penis is present in most mammals but absent in humans and horses.
In domestic animals the penis is divided into three parts:
* Roots (crura): these begin at the caudal border of the pelvic ischial arc.
* Body: the part of the penis extending from the roots.
* Glans: the free end of the penis.
The internal structures of the penis consist mainly of cavernous (erectile) tissue, which is a collection of blood sinusoids separated by sheets of connective tissue (trabeculae). Some animals have a lot of erectile tissue relative to connective tissue, for example horses. Because of this a horse's penis can enlarge more than a bull's penis. The urethra is on the ventral side of the body of the penis.
Stallions have a vascular penis. When non-erect, it is quite flaccid and contained within the prepuce (sheath). The retractor penis muscle is relatively... [continues]
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(2012, 04). Penis Penis. StudyMode.com. Retrieved 04, 2012, from http://www.studymode.com/essays/Penis-Penis-976130.html
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"Penis Penis." StudyMode.com. 04, 2012. Accessed 04, 2012. http://www.studymode.com/essays/Penis-Penis-976130.html.