A-side and B-side. The terms A-side and B-side refer to the two sides of 78, 45, and 33 1/3 rpm phonograph records, whether singles, extended plays (EPs), or long-playing (LP) records.
The two ureters connect to either side of the top of the bladder, which is the organ that stores urine until it is expelled from the body. Urine is expelled from each kidney into its respective ureter. Once it enters the ureters, peristalsis moves the urine down the tube and into the bladder.
The ureters are two thick tubes which act to transport urine from the kidney to the bladder. They are 25cm long, and are situated bilaterally, with one ureter draining each kidney.The ureteric walls are comprised of smooth muscle, which contracts to produce peristaltic waves.This propels the urine towards the bladder.he ureters are two thick tubes which act to transport urine from the kidney to the bladder. They are 25cm long, and are situated bilaterally, with one ureter draining each kidney. The ureteric walls are comprised of smooth muscle, which contracts to produce peristaltic waves. This propels the urine towards the bladder.