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:
The ureter is the tube that connects each kidney to the bladder. The kidneys clean the blood and filter waste from it. This process produces a liquid waste, urine.Urine flows â¦ from the kidneys through the ureters to the bladder. The urine is stored in the bladder until a person urinates.During urination, the urine leaves the body by passing from the bladder through another tube, the urethra, which is open at one end. in humans, ureters are two pairs of long muscular tubes (about 25-30cm) that carry urine from kidneys to urinarry bladders.n example of this is a duplicate ureter, where there is an extra ureter running from a kidney to t â¦ he bladder. Uterocele is a narrowing of the ureter which could cause urine to back up into the kidneys and damage the kidney. This is usually caused by a small tumor or hernia.