4(a)
The diagram below shows the Excretory System of a Human being. Study the same and then answer the questions that follow :
(i) Name the parts labelled 1, 2, 3 and 4.
(ii) Give the main function of the parts labelled 5, 6, 7 and 8.
(iii) Name the endocrine gland which could be added in the diagram and state its location/position.
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(i) The parts labelled 1, 2, 3 and 4 are:
- 1 → Posterior Vena Cava
- 2 → Aorta
- 3 → Renal Artery
- 4 → Renal Vein
(ii) Main function of the parts labelled 5, 6, 7 and 8 are:
- 5 → Ureter — Carry urine from kidneys to urinary bladder.
- 6 → Urinary bladder — Contain the urine till it is released out.
- 7 → Sphincter muscles — Guards the opening of the bladder into the urethra and relaxes only at the time of urination.
- 8 → Urethra — Passage through which urine is given out of the body.
(iii) Adrenal gland. It is located above each kidney in the form of a cap.