Which of the following is a protective tubular sheath of skin covering the penis?

The correct answer, "prepuce," refers to the protective tubular sheath of skin that covers the penis. This structure is also commonly known as the foreskin, but the term "prepuce" is the more precise anatomical terminology. It serves several functions, including protecting the glans of the penis and maintaining moisture, which can be important for overall penile health.

Using the term "prepuce" highlights its anatomical identity and is widely recognized in veterinary medicine and biology. In some contexts as well, describing this structure can help clarify discussions around circumcision and the natural variations in male anatomy.

The other choices refer to different anatomical structures. The foreskin is synonymous with the prepuce, but is a less formal term. The glans refers specifically to the sensitive tip of the penis, while the urethra is the tube that carries urine and semen out of the body. Understanding these distinctions is crucial for effective communication in veterinary medical applications and anatomy studies.