Osmium is the least abundant stable element in the earth's crust and is the densest stable element. It is found in the alloys osmiridium and iridiosmium and as an uncombined element. Osmium was first discovered by Smithson Tennant in 1803.his compound forms spontaneously when pure osmium metal is in contact with air, and is both volatile and extremely toxic, and thus the pure metal is rarely used. Osmium is, however, the most dense naturally occurring element and imparts hardness when used in metal alloys.
2 ROLES OF SEX HORMONES: 1) organizational effects - permanent, influence brain and sex organ development. 2) activational effects - occur later in life, after development of sex organs. SEX ORGAN. gonads - testes or ovaries, first to develop. internal sex organs - precursors for male and female present in embryo.
The work that hormones do is subtleâyet when they fall out of balance, the effects on your health may be anything but. I think of the body's hormones as musical instruments in an orchestra: Each plays its own part in creating a perfect concertâuntil the day one is out of tune and throws off the entire melody. Although it was many years ago, I still remember one of the first patients I saw with a hormonal disturbance.