There is a pari of bean -shaped organs P in the human body towards the back, just above the waist. A waste product Q formed by the decomposition of unsued proteins in the liver is brough into organ P through blood by an artery R. The numerous tiny filters S present in organ P clean the dirty blood by removing the waste salts, and excess water form a yellowish liquid U which goes from organ P into a bag -like structure V through two tubes W. This liquid is then thrown out of the body through a tube X.
(a) What is (i) organ P, and (ii) waste substance Q ?
(b) Name (i) artery R, and (ii) vein T
(c) What are tiny filters S known as ?
(d) Name (i) liquid U (ii) structure V (iii) tubes W, and (iv) tube X

Answer

(a) (i) Kidneys (ii) Urea (b) (i) Renal artery (ii) Renal vein (c) Nephrons (d) (i) Urine (ii) Bladder (iii) Ureters (iv) Urethra