Question

Name the excretory organs in:

(i) Amoeba

(ii) Insects

(iii) Earthworm

Answer 1

Excretory organs:

• The organs involved in removing excessive and waste products from the body are known as excretory organs.

(i) Excretory organs in amoeba:

• The amoeba is a eukaryotic organism containing a single cell that digests the food after ingesting it.
• The waste products are accumulated by the contractile vacuoles that will be released from the surface of the amoeba through dispersion.

Therefore, the excretory organs in the amoeba are contractile vacuoles.

(ii) Excretory organs in Insects:

• The insects contain Malpighian tubules in their body that remove the toxic and waste material from the hemolymph to produce primary urine.
• The primary urine is released from the body through the rectum.

Therefore, the excretory organs in insects are Malpighian tubules.

(iii) Excretory organs in Earthworms:

• The earthworm is a segmented organism that contains tubular-shaped organs called nephridia.
• The nephridia are responsible for removing the waste products released during metabolic processes from the body.

Therefore, the excretory organs in earthworms are nephridia.