The baculum (also penis bone, penile bone or os penis) is a bone found in the penis of most mammals including canidae and felidae. It is absent in humans, equidae, marsupials, lagomorphs, and hyaenas, amongst others. It is used for copulation and varies in size and shape by species. Its characteristics are sometimes used to differentiate between similar species. The word baculum originally meant "stick" or "staff" in Latin. The homologue to the baculum in female mammals is known as the baubellum or os clitoris.
In humans, which lack the baculum and baubellum, the rigidity of the erection is provided entirely through blood pressure in the corpus cavernosum.
Examples of animals with a penile bone include rats, dogs and walruses.
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Date: 2006-08-29 07:15 am (UTC)From Wiki:
The baculum (also penis bone, penile bone or os penis) is a bone found in the penis of most mammals including canidae and felidae. It is absent in humans, equidae, marsupials, lagomorphs, and hyaenas, amongst others. It is used for copulation and varies in size and shape by species. Its characteristics are sometimes used to differentiate between similar species. The word baculum originally meant "stick" or "staff" in Latin. The homologue to the baculum in female mammals is known as the baubellum or os clitoris.
In humans, which lack the baculum and baubellum, the rigidity of the erection is provided entirely through blood pressure in the corpus cavernosum.
Examples of animals with a penile bone include rats, dogs and walruses.