What is the main function of prostomium in earthworm?a)Digging the soilb)As a sensory organc)Both (a) and (b)d)As a mouthCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

𝙴𝚊𝚛𝚝𝚑𝚠𝚘𝚛𝚖𝚜 𝚞𝚜𝚎 𝚝𝚑𝚎 𝚙𝚛𝚘𝚜𝚝𝚘𝚖𝚒𝚞𝚖 𝚝𝚘 𝚜𝚎𝚎 𝚝𝚑𝚎𝚒𝚛 𝚎𝚗𝚟𝚒𝚛𝚘𝚗𝚖𝚎𝚗𝚝, 𝚊𝚜 𝚎𝚊𝚛𝚝𝚑𝚠𝚘𝚛𝚖𝚜 𝚑𝚊𝚟𝚎 𝚗𝚘 𝚎𝚢𝚎𝚜, 𝚎𝚊𝚛𝚜, 𝚗𝚘𝚜𝚎 𝚘𝚛 𝚑𝚊𝚗𝚍𝚜. 𝚃𝚑𝚎𝚢 𝚍𝚎𝚙𝚎𝚗𝚍 𝚘𝚗 𝚝𝚑𝚎 𝚙𝚛𝚘𝚜𝚝𝚘𝚖𝚒𝚞𝚖 𝚊𝚗𝚍 𝚜𝚔𝚒𝚗 𝚝𝚘 𝚑𝚎𝚕𝚙 𝚒𝚝 𝚏𝚎𝚎𝚕 𝚝𝚑𝚎𝚒𝚛 𝚠𝚊𝚢 𝚝𝚑𝚛𝚘𝚞𝚐𝚑 𝚝𝚑𝚎 𝚜𝚘𝚒𝚕. 𝙰𝚜 𝚝𝚑𝚎 𝚎𝚊𝚛𝚝𝚑𝚠𝚘𝚛𝚖 𝚝𝚞𝚗𝚗𝚎𝚕𝚜 𝚝𝚑𝚛𝚘𝚞𝚐𝚑 𝚝𝚑𝚎 𝚜𝚘𝚒𝚕, 𝚒𝚝 𝚎𝚡𝚌𝚛𝚎𝚝𝚎𝚜 𝚖𝚞𝚌𝚞𝚜 𝚏𝚛𝚘𝚖 𝚒𝚝𝚜 𝚋𝚘𝚍𝚢.

Answer

The prostomium is actually a sensory device.Earthworms do not have a nose , eyes , ears , or hands to gather sensory information about their environment. Instead, they depends on their prostomium and sensory receptors in their skin to feel their way through the soil. The first body segment is called the peristomium. So the correct option is (C).

Answer

Earthworms use the prostomium to see their environment, as earthworms have no eyes, ears, nose or hands. They depend on the prostomium and skin to help it feel their way through the soil.

Answer

Function of Prostomium in Earthworm

The prostomium is a specialized anatomical structure found in the earthworm. It is a small lobe-like structure, which is located at the anterior end of the worm, i.e., the end which faces towards the soil surface. The main functions of the prostomium in earthworms are:

1. Sensory Organ: The prostomium of earthworms is richly supplied with sensory nerves. It contains a number of chemoreceptors and mechanoreceptors, which help the earthworm to sense its environment. The prostomium is particularly important in helping the earthworm to detect food, as it is the first part of the body to come into contact with the soil.

2. Digging the Soil: The prostomium of earthworms also plays an important role in digging the soil. It is covered with a layer of mucus, which helps the earthworm to move through the soil more easily. The prostomium is also equipped with a number of small bristles, called setae, which help the earthworm to grip the soil as it moves.

3. As a Mouth: In some species of earthworms, the prostomium is modified into a muscular, cone-shaped structure, which is used as a mouth. This type of prostomium is known as a peristomium. It is located just behind the actual mouth of the earthworm, and helps to grab and manipulate food as it is pulled into the worm's digestive system.

Conclusion

In summary, the prostomium of earthworms is a specialized structure that plays an important role in both sensing the environment and digging through the soil. It is a complex structure that is richly supplied with nerves and is covered in mucus and setae, which help the earthworm to move through the soil more easily. In some species of earthworms, the prostomium is also modified into a peristomium, which functions as a mouth.

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