A)Kidneys that are extremely good at producing a concentrated urine
B)Body fluid concentrations that are similar to or greater than those of seawater
C)The ability to secrete salts and wastes into their intestinal contents like an insect
D)Use of ammonia as their primary nitrogenous waste
E)Specialized gill epithelia

A)overall size with cells and proteins usually being kept out of the filtrate.
B)whether they are charged or not.
C)whether the substance in question is a waste product or not.
D)whether they contain nitrogen or not.
E)the hydration state of the body.

A)collecting duct
B)renal pelvis
C)ureter
D)urethra
E)urethra $\rarr$ collecting duct $\rarr$ renal pelvis $\rarr$ ureter $\rarr$ urinary bladder