CBSE Class 10 Science 2020 · Paper 31/2/3 · Question 28

(a) The labelled diagram shows a pair of bean-shaped kidneys in the upper abdomen on either side of the backbone, a ureter running from the notch of each kidney down to the urinary bladder in the lower abdomen, and a single urethra leading from the bladder out of the body (the aorta and vena cava, with a renal artery and a renal vein to each kidney, complete the textbook figure). (b) (i) Kidney: filters the blood to remove nitrogenous wastes such as urea, forming urine. (ii) Ureter: carries (transports) urine from the kidney to the urinary bladder. (iii) Urinary bladder: stores urine until it is passed out. (iv) Urethra: carries urine from the bladder out of the body (excretes urine).