Question

Type of respiration in cockroach is
A) Cutaneous
B) Tracheal
C) Pulmonary
D) Brancheal

Answer 1

Hint: The respiratory system of insects differs from that of other organisms. The respiratory system of cockroaches is very efficient which carries air directly to the tissues.

Complete Answer:
- A cockroach is an arthropod which has an exoskeleton. They are territorial organisms and have hemolymph instead of blood.
- They breathe in air through the fine opening present in pairs in the thorax and abdomen. These openings are called spiracles. These are similar to the nostril.
- The respiratory system comprises tube-like structures called the tracheae. The spiracles take in air and transport it to the tracheae.
- From trachea, the air diffuses to various tissues and cells of the body. The carbon dioxide rich air passes into the tracheae and moves out through spiracles.
1) Cutaneous respiration- It is the type of respiration in which the organism breathes in through skin. For example earthworms.
2) Pulmonary respiration- It is the type of respiration in mammals. It involves lungs. For example humans, cats, dogs, frogs.
3) Branchial respiration- The respiration through gills is called branchial respiration. Example fishes.

Thus the correct answer is B. The type of respiration in cockroaches is tracheal respiration.

Note: Cockroach can hold breath for around 7 minutes. This adaptation helps the cockroach to adapt with extreme conditions. The tracheal system helps in directly transporting the air to the tissues.