Deep Space Nine (1993â1999) Star Trek: Deep Space Nine is also sometimes called DS9. It is set in the late 24th century, at the end of The Next Generation's time line and the start of Voyager's. It is not like TOS and TNG because it is set on a space station and is not about exploring.
The corpus spongiosum is the mass of spongy tissue surrounding the male urethra within the penis. Also called the corpus cavernous urethrae in older texts.
Metanephridia [edit]. A metanephridium (meta = after) is a type of excretory gland found in many types of invertebrates such as annelids, arthropods and molluscs.(In molluscs it is known as the Bojanus organ .). protonephridium (proto = first) is a network of dead-end tubules lacking internal openings found in the phyla Platyhelminthes, Nemertea and Rotifera. The ends are called flame cells (if ciliated) or solenocytes (if flagellated); they function in osmoregulation and ionoregulation, respectively.