Define the following terms :
(a) Ultrafiltration
(b) Micturition
(c) Renal Pelvis
(d) Urea
(e) Osmoregulation
(a) Ultrafiltration - The process of the filtration of blood in the glomerulus under great pressure during which the liquid part of the blood i.e. plasma along with urea, glucose, amino acids and other substances enter the renal tubule.
(b) Micturition: The process of expelling urine out of the body through the urethra by opening the sphincter muscles or passing of urine involving relaxation of sphincter muscles between the urinary bladder and urethra.
(c) Renal pelvis - Renal pelvis is the expanded front end of the ureters into the kidney.
(d) Urea - A nitrogenous waste produced primarily in the liver due to the break down dead protein remains and extra amino acids.
(e) Osmoregulation It is a process of maintaining the blood composition of the body i.e. the normal osmotic concentration of water and salts in the body.