Given alongside is the diagram of an organ system of humans. Study the same and answer the following questions :

1. Name the organ systems shown completely and partially respectively.
2. Label the guidelines 1 to 4.
3. Name the muscular sheet which divides the thorax and abdomen.
4. Mention the blood vessel which supplies blood from the heart to the kidney.
5. Name the blood vessel which carries deoxygenated blood that is devoid of nitrogenous wastes.

1. In the given diagram, the organ system that is shown completely is Excretory system, and the organ system that is shown partially is Circulatory system.

2. The guidelines 1 to 4 shows :
   1 → Kidney
   2 → Ureter
   3 → Urinary bladder
   4 → Urethra

3. The muscular sheet that divides the thorax and abdomen is called the diaphragm.

4. The Renal artery supplies blood from the heart to the kidney.

5. The renal vein carries deoxygenated blood back to the heart, which has been filtered by the kidney and is now relatively devoid of nitrogenous wastes.