Gallery of Volcanic Rocks. Photo (c) Andrew Alden, licensed to About.com (fair use policy) Igneous rocks -- those which originate from magma -- fall into two categories: Extrusive and intrusive. Extrusive rocks erupt from volcanoes or seafloor fissures, or they freeze at shallow depths. This means that they cool relatively quickly and under low pressures, therefore they are typically fine grained and gassy.
on average it takes the human body approximately two to three hours to excrete a liter of water through the bladder this is dependent on several factors including the absorption of water the components in the water if dehydration is present the time of day and the general health of the person continue reading
The urine then passes from the kidneys to the urinary bladder by way of the two ureters. The ureters are basically muscular tubes which pass the urine to the bladder, and the primary function of the ureters. The urine then collects in your bladder untilâ¦ you feel the urge. As you urinate, the urine then leaves the bladder and expels from your body through your urethra. As we stated earlier, the urethra opening to expel the urine is located in different places for men and women. For men, the urethra opens at the tip of the penis.