How is the amount of urine produced regulated?

$(a)$ 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.

Describe the structure and functioning of nephrons.

The filtration units of kidneys are called:

$(a)$ Draw a diagram of the human excretory system and label the following: Aorta,Vena cava,Urinary bladder,Urethra.
$(b)$ List two vital functions of the kidney.

$(a)$ Name the following:
$(i)$ Part in which urine is produced.
$(ii)$ Part which stores the urine.
$(iii)$ Part which connects $(i)$ and $(ii)$.
$(iv)$ Part from which urine is passed out.
$(b)$ Name the factors on which the amount of water reabsorbed along the tubular part of the nephron depends.