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• Oesophagus is the food tube.
• It connects mouth to stomach.
• When we swallow food, the walls of the oesophagus squeeze together (contract). This moves the food down the oesophagus to the stomach.
* On August 24, 2020, Dr. G. Satheesh Reddy has been given a two-year extension as the Chairman of Defence Research and Development Organisation (DRDO).
* He was appointed to the post in August 2018 for two years, and now has gotten two-year extension.
* He is the Chief Architect of India's Mission Shakti Anti Satellite Missile Test (ASAT).
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