(N/A) The human excretory system consists of the following structures:
$1$. $A$ pair of kidneys: Bean-shaped organs responsible for filtering blood and forming urine.
$2$. $A$ pair of ureters: Ducts that carry urine from the kidneys to the urinary bladder.
$3$. Urinary bladder: $A$ muscular sac that stores urine until it is voided.
$4$. Urethra: $A$ tube through which urine is expelled from the body.
$5$. Associated blood vessels: Renal artery (supplies blood to kidneys) and renal vein (drains blood from kidneys),along with the dorsal aorta and inferior vena cava.
$6$. Adrenal glands: Endocrine glands located on the superior aspect of each kidney.