The Soviet Union duplicated its dual-launch feat with Vostok 5 and Vostok 6 (June 16, 1963). This time they launched the first woman (also the first civilian), Valentina Tereshkova, into space on Vostok 6. Launching a woman was reportedly Korolev's idea, and it was accomplished purely for propaganda value.
Lumen: A luminous term referring to the channel within a tube such as a blood vessel or to the cavity within a hollow organ such as the intestine. Lumen is a luminous term because it is Latin for light, including the light that comes through a window. When a hollow organ is cut across, you can see light through the space that has been opened. So the word lumen came to mean this space.
The prostate gland is a male reproductive organ whose main function is to secrete prostate fluid, one of the components of semen.The muscles of the prostate gland also help propel this seminal fluid into the urethra during ejaculation.The prostate is a muscular gland that weighs about three-fourths of an ounce (20 grams) about the size of a small apricot.It surrounds the urethra just beneath the bladder.he prostate gland is a male reproductive organ whose main function is to secrete prostate fluid, one of the components of semen.