Describe excretion in cockroach?
• In cockroach, inorganic salts and water are major waste products.
• In cockroach, malpighian tubules or tracheal tubules are excretory organs.
• CO2 is removed through tracheal tubes.
• Other wastes are extracted by malpighian tubules from hemolymph.
• Urine moves to hinder parts of the body. Here water is absorbed and wastes and finally thrown outside of the body as faeces.
Structure of malpighian tubule:
• These are yellowish thread like structures.
• They are arranged in six groups each having about fifteen blind ended
• tubules.
• These blind ended tubules float freely in hemolymph.