Less Susceptible Organ to Harmful Radiations: Lungs

Radiations can have harmful effects on the human body, and certain organs are more susceptible to these effects than others. In the given options, the correct answer is option D, lungs. Let's understand why lungs are less susceptible to harmful radiations compared to the other organs mentioned.

Explanation:

1. Radiations and their effects
- Radiations can be of different types, such as ionizing radiation (e.g., X-rays, gamma rays) and non-ionizing radiation (e.g., radio waves, microwaves).
- Ionizing radiation has higher energy and can ionize atoms and molecules, causing damage to cells and DNA.
- The harmful effects of ionizing radiation include an increased risk of cancer, genetic mutations, and damage to organs and tissues.

2. Susceptibility of organs to radiations
- Different organs have varying degrees of susceptibility to radiation, depending on factors such as the type and energy of the radiation, the sensitivity of the organ's cells, and the amount of radiation exposure.
- Organs with cells that rapidly divide are generally more susceptible to radiation damage because radiation affects the DNA replication and cell division processes.

3. Lungs and radiation susceptibility
- The lungs are relatively less susceptible to harmful radiations compared to other organs like the eyes, heart, and brain.
- The cells in the lungs do not divide as frequently as cells in other organs, making them less vulnerable to the damaging effects of radiation.
- Additionally, the lungs have a natural defense mechanism that helps in reducing radiation exposure. The lining of the respiratory tract contains mucus and tiny hair-like structures called cilia, which help to trap and remove potentially harmful particles, including radioactive particles, from the air we breathe.
- The lungs also have a self-repair mechanism that can repair some of the radiation-induced damage to cells.

Conclusion:

In conclusion, the lungs are less susceptible to harmful radiations compared to the eyes, heart, and brain. This is because lung cells divide less frequently, and the lungs have protective mechanisms like mucus, cilia, and self-repair processes that help in minimizing the damage caused by radiation. However, it's important to note that excessive exposure to radiation can still have negative effects on lung health, and precautions should always be taken to minimize radiation exposure.