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:
âº The function of the urinary bladder is to store urine until it is expelled from the body. âº The urinary bladder expands when it is full, and reduces in size when empty. âº Circular muscles, known as sphincter muscles, prevent the leakage of urine from the bladder.