Why people yawn when they are sleepy? Are there any biological reasons behind yawning? 1.56K viewsJanuary 1, 2024 Question100.55K May 24, 2023 0 Comments Why people yawn when they are sleepy? Are there any biological reasons behind yawning? In: 299 26 Answers ActiveNewestOldest Anonymous Posted May 24, 2023 0 Comments Yawning tells your body that it’s ok to relax. It widens your rib cage and sends a signal to your brain that it got a full breath. Wide jaw and rapid exhalation of breath calms the nervous system. You are viewing 1 out of 26 answers, click here to view all answers. Register or Login
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