Biology
The diagram given below represents an organ system in the human body. Study the same and answer the questions that follow:
(i) Identify the system.
(ii) Label the parts marked 2 and 4. Mention the function of part 5.
(iii) Name the structural and functional units of the part marked 1.
(iv) What is the fluid that accumulates in part 3? Which is the main nitrogenous waste present in it?
(v) Draw a neat, labelled diagram showing the longitudinal section of part 1.
Excretory System
ICSE 2019
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Answer
(i) The diagram represents the Urinary/Excretory system.
(ii) The parts marked 2 and 4 are:
- 2 → Ureter
- 4 → Sphincter muscle
Part 5 is urethra. It's function is to expel urine outside the body from the urinary bladder at the time of urination (micturition)
(iii) The structural and functional units of kidneys are nephrons.
(iv) Fluid that accumulates is Urine. The main nitrogenous waste present in it is Urea.
(v) Below is the labelled diagram showing the longitudinal section of part 1 i.e., Kidneys:
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