Wave-like movement in the food pipe is caused by coordinated contraction and relaxation of muscle cells. This peristaltic motion pushes food steadily toward the stomach.
Class 8 Science Curiosity Chapter 2 The Invisible Living World: Beyond Our Naked Eye NCERT solutions
Class 8 Science Grade 8 Chapter 2 The Invisible Living World: Beyond Our Naked Eye question answer
The wave-like movement or peristalsis, occurs when circular and longitudinal muscles in the oesophagus contract and relax in sequence. These contractions create a pushing force that moves food from the throat to the stomach. This process is automatic and controlled by the nervous system, ensuring smooth digestion. Without peristalsis, swallowing and transporting food inside the digestive tract would be difficult.
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