Respiratory organs of silkworm are
(a) Lungs
(b) Tracheae
(c) Malpighian tubules
(d) Skin

Options

A. Lungs
B. Tracheae
C. Malpigghian tubules
D. Skin.

Answer

To determine the respiratory organs of the silkworm, we need to analyze the options provided:

1. **Understanding the Silkworm**: The scientific name for the silkworm is *Bombyx mori*. It is important to know that silkworms belong to the phylum Arthropoda and are classified under the class Insecta.

2. **Identifying Respiratory Organs**:
- **Option (a) Lungs**: Lungs are respiratory organs found in mammals and some other vertebrates, but insects, including silkworms, do not possess lungs.
- **Option (b) Tracheae**: Insects breathe through a system of tubes known as tracheae. These tubes transport air directly to the tissues, allowing for gas exchange. This is the primary respiratory system in insects.
- **Option (c) Malpighian tubules**: These are not respiratory organs; instead, they are excretory structures in insects that help in the removal of waste.
- **Option (d) Skin**: While some organisms can respire through their skin, insects do not use their skin as a respiratory organ.

3. **Conclusion**: Based on the analysis, the correct answer is option (b) Tracheae, as they are the respiratory organs of the silkworm.

Final Answer: (b) Tracheae