Introduction:
The concept of Fundamental Duties was introduced in the Constitution of India through the 42nd Amendment. It was incorporated in 1976 during the period of emergency. The amendment aimed to emphasize the importance of civic responsibilities and the obligations of citizens towards the nation.

Explanation:
The 42nd Amendment to the Constitution of India, also known as the "Mini Constitution," was passed by the Parliament in 1976. It was introduced during the period of emergency and made significant changes to various aspects of the Constitution. One such change was the introduction of Fundamental Duties.

Importance of Fundamental Duties:
The concept of Fundamental Duties was inspired by the Constitution of the Soviet Union and aimed to promote a sense of responsibility and discipline among citizens. It emphasized that rights and duties are two sides of the same coin and that citizens have certain obligations towards the nation.

Inclusion of Fundamental Duties:
The 42nd Amendment added a new part, Part IV-A, to the Constitution, which contains a list of ten Fundamental Duties. These duties were not enforceable by the courts but were considered binding on citizens and were intended to serve as moral obligations.

Key Fundamental Duties:
The ten Fundamental Duties included in the Constitution are as follows:
1. To abide by the Constitution and respect its ideals and institutions.
2. To cherish and follow the noble ideals that inspired the national struggle for freedom.
3. To uphold and protect the sovereignty, unity, and integrity of India.
4. To defend the country and render national service when required.
5. To promote harmony and the spirit of common brotherhood among all citizens.
6. To value and preserve the rich heritage of the country's composite culture.
7. To protect and improve the natural environment, including forests, lakes, rivers, and wildlife.
8. To develop a scientific temper, humanism, and the spirit of inquiry and reform.
9. To safeguard public property and abjure violence.
10. To strive towards excellence in all spheres of individual and collective activity.

Conclusion:
The 42nd Amendment to the Constitution of India introduced the concept of Fundamental Duties. These duties aimed to inculcate a sense of responsibility and loyalty among citizens towards the nation. Though not enforceable by the courts, they serve as moral obligations and highlight the importance of civic responsibilities.