Non-silicates constitute less than 10% of the Earth's crust. The most common non-silicates are the carbonates, the oxides, and the sulfides. There are also naturally occuring phosphates and salts. There are a few elements which occur in pure form, including gold, silver, copper, bismuth, arsenic, lead and tellurium.Carbon is found in both graphite and diamond form.he most common minerals are the silicates, as one would guess by looking at the abundances of the elements in the Earth's crust, but there is a great variety of minerals. Minerals are classified in many ways, including hardness, optical properties, crystal structure, etc.
Vas deferens: The tube that connects the testes with the urethra. The vas deferens is a coiled duct that conveys sperm from the epididymis to the ejaculatory duct and the urethra.
Along the way they pass through the scrotum, spermatic cord, inguinal canal, and pelvic body cavity. The location and function of the ductus deferens makes it a prime area for male contraception surgery....Click to read more below. The ductus deferens, also known as the vas deferens, is a tiny muscular tube in the male reproductive system that carries sperm from the epididymis to the ejaculatory duct.he ductus deferens serves dual functions in the male reproductive system: 1  Transporting sperm from the testes to the ejaculatory duct and urethra. 2  Storing sperm until it is ready to be ejaculated.