The animation below illustrates how gravitational waves are emitted by two neutron stars as they first orbit each other and then coalesce. Though gravitational waves were predicted to exist in 1916, actual proof of their existence wouldn't arrive until 1974, 20 years after Einstein's death.
Uroabdomen can result from various causes, but the most common is related to trauma. Damage to the kidney, ureter, bladder, or urethra may cause urine to leak into the abdomen. Some common forms of trauma that can result in a disruption of the urinary tract in cats include:
Kidney Structure and Function. ïOnce urine is formed, it passes into a cavity. called the minor calyx. ïMultiple minor calyces drain into the major. calyx. ïThe major calyx empties into ureters that. drain the kidney. ïFrom there, the ureters empty into the. urinary bladder where urine is stored.