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Description: When you want to forcefully exhale air, your brain tells one set of the intercostal muscles between the ribs as well as the abdominal muscles to contract. This quickly decreases the size of the thoracic cavity and expels a large volume of air in just a few seconds—perfect for blowing bubbles,
Picture Stats: Views: 903 Filesize: 143.78kB Height: 1487 Width: 2125 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=13238 |