Ovarian failure: Ovarian failure causes elevated fsh and lh, ovarian falure is mostly due to genetic or immune causes - although we do not know or understand all the possible reasons. ... Read more Dr. Gerard Honore Dr. Honore
Organ pipes are generally made out of either metal or wood. Very rarely, glass, porcelain, plastic, paper, Papier-mÃ¢chÃ©, or even stone pipes may be seen. A historical organ in the Philippines has pipes made exclusively of bamboo. Metal pipes are usually made of lead; for increased rigidity it is alloyed with tin along with trace amounts of antimony and copper.
Brass instruments do not get their name from being constructed of brass, but rather how the sound is produced. In these instruments, sound is forced through brass fixtures to create a unique sound. Tubas, trumpets, horns, and trombones are examples of brass instruments. It is important to note that saxophones are not, despite the fact that they are often made from brass, as they produce sound from a reed.