Question

Complete the following statement :

a.In cockroach grinding of food particles is performed by

b.Malpighian tubules help in removal of

c.Hind gut of cockroach is differentiated into

d.In cockroach blood vessels open into spaces called

• A. ileum, colon, rectum
• B. gizzard
• C. sinuses
• D. nitrogenous wastes

Answer 1

Answer: (A), (B), (C), (D)

a. Gizzard:

• Gizzard or the proventriculus is thick walled.
• It bears teeth for grinding food and the thick muscular wall assists in grinding.

Final answer: In cockroach grinding of food particles is performed by gizzard.

b. Malpighian tubules:

• Malpighian tubules are unbranched blind tubules.
• They are attached to the alimentary canal at the junction of midgut and hindgut.
• They remove the metabolic waste, mainly nitrogenous, from the blood.

Final answer: Malpighian tubules help in removal of nitrogenous wastes.

c. Gut of cockroach:

• The alimentary canal in a cockroach is divisible into three parts: Foregut, Midgut, Hindgut.
• Foregut comprises pre-oral cavity, mouth, pharynx, oesophagus, crop and gizzard.
• Hindgut comprises ileum, colon and rectum.

Final answer: Hind gut of cockroach is differentiated into ileum, colon, rectum.

d. Vascular system:

• Blood vascular system in cockroach is of open type.
• Blood is present in open spaces called sinuses of the haemocoel.

Final answer: In cockroach blood vessels open into spaces called sinuses.