$(a)$ Draw a diagram of the human urinary system and label the following parts:
$(i)$ Kidney
$(ii)$ Ureter
$(iii)$ Urinary bladder
$(iv)$ Urethra
$(b)$ Name the two major components of normal human urine.

(N/A) The human urinary system consists of a pair of kidneys,a pair of ureters,a urinary bladder,and a urethra. (Refer to the provided diagram for labeling).
$(b)$ The two major components of normal human urine are:
$1.$ Water (which constitutes about $95\%$ of urine).
$2.$ Nitrogenous waste products,primarily urea (which constitutes about $2\%$ of urine),along with other salts and minerals.