Name the following :
(a) The organ which produces urea.
(b) The outer region of the kidney containing the Bowman's capsule.
(c) The tuft of capillaries inside the Bowman's capsule.
(d) The part of kidney tubules where the term urine is first used for the fluid in it.
(e) The vein in which urea concentration is maximum.
(a) Liver
(b) Cortex
(c) Glomerulus
(d) Collecting duct
(e) Hepatic vein