Question

(a) Draw human excretory system and label the following parts :
(i) Left kidney
(ii) Urethra
(iii) Urinary bladder
(iv) Vena cava.
(b) State the purpose of forming urine.
(c) Name any two substances which are selectively reabsorbed from the tubules of a nephron.


CBSE Class X Science LA (5 Marks)

Answer 1

I hope that it helps

Answer 2

Dear Student,

◆ Answers -

(a) Human excretory system diagram.

[Refer to the image for diagram of human excretory system with labelling of imp structures.]

(b) Purpose of forming urine -

• disposal of toxic ammoniacal products
• maintainace of blood volume and ECF
• electrolytic balance
• pH bhffering

(c) Substances selectively absorbed by kidneys -

• water
• glucose
• amino acids
• essential ions

Hope that is all...