larynx during respiration at rest normal respiratory rate (3-4 seconds each)
larynx during respiration at rest normal respiratory rate (3-4 seconds each)
laryngeal function during respiration at rest showed normal respiratory rate (3-4 seconds each or 12-20 per minute)
laryngeal function during respiration at rest showed normal respiratory rate (3-4 seconds each or 12-20 per minute)