Urethra: The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm.When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.rethra: The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of ejaculating semen when the man reaches orgasm.
Collagen plugs. Collagen is a component of connective tissue. The dentist places a sponge like material made of specially processed bovine collagen into the socket and sutures it in place. A collagen plug is a good deal less expensive than a bone graft, and the procedure for placing it is easier.ollagen is a component of connective tissue. The dentist places a sponge like material made of specially processed bovine collagen into the socket and sutures it in place. A collagen plug is a good deal less expensive than a bone graft, and the procedure for placing it is easier.
Punctal plugs are tiny, biocompatible devices inserted into tear ducts to block drainage. This increases the eye's tear film and surface moisture to relieve dry eyes. Also known as punctum plugs, lacrimal plugs or occluders, these devices often are no larger than a grain of rice.unctal plugs usually are considered when non-prescription or prescription eye drops fail to relieve your dry eye condition. Two general types of tear duct plugs are: 1  Semi-permanent, typically made of long-lasting materials such as silicone.