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.
Mucus plug: An accumulation of mucus and thick fluid that blocks the opening of the cervix (the opening from the uterus to the vagina) during pregnancy. The mucus plug serves to protect the uterus and the fetus by preventing bacteria from entering the uterus. The mucus plus can be clear or slightly pink in color and can be tinged with brown or red blood. As the cervix slowly begins to dilate prior to the onset of labor, the mucus plug is expelled.