What is meant by excretion? Explain the process of formation of urine.

i) Draw the diagram of the human excretory system and label:
a) urinary bladder
b) urethra.

ii) Name two major components of normal human urine.

Describe the process of urine formation.

Draw a well labelled diagram of human excretory system.

Remarkable reduction in blood pressure affects normal functioning of the kidney as follows:

Draw excretory system in human beings and label the following organs of the excretory system which performs the following functions:

(i) form urine.
(ii) is a long tube that collects urine from the kidney.
(iii) store urine until it is passed out.

Correct the following statements by changing the underlined words:

The normal pale yellow colour of the urine is due to the presence of the pigment Melanin.

Attempt the following:

Excretion of Nitrogenous wastes is carried out by the Kidneys. Name :
(a) The opening through which the urine is released.
(b) The basic filtration units in the kidney.

The kidneys in human beings are a part of the system for:

Removal of wastes from the body is called _____.