Bladder infections are more common in women rather than men, it caused by various strains of E. coli that reach the bladder through the urethra. Urethra is a tube that connects the urinary bladder to the genital organ for the removal of urine through out the body.
Noun. 1. archipelago-a group of many islands in a large body of water. island-a land mass (smaller than a continent) that is surrounded by water.rÂ·chiÂ·pelÂ·aÂ·go. n. pl. arÂ·chiÂ·pelÂ·aÂ·goes or arÂ·chiÂ·pelÂ·aÂ·gos. 1. A large group of islands: the Philippine archipelago. 2. A sea, such as the Aegean, containing a large number of scattered islands.
So they are sometimes also called sea squirts. They may do this to get rid of something in them, or when they are disturbed. Colonial ascidians: Some ascidians form as solitary animals, sometimes called simple ascidians. Other ascidians may form colonies with many individual animals called zooids. They are called colonial or compound ascidians. In some colonies, the zooids are quite independent of one another.