At the end of each branch are tiny air sacs called alveoli. This is where ... As the infection travels through your respiratory tract, your immune system fights back. Your lungs and airways ...

That sandpaper feeling in your mouth when you wake up might be more than just annoying—it could be your body’s early warning system flagging a problem with your respiratory health. While most ...

The flu is a contagious viral infection of the respiratory system that affects the nose ... of the lungs occurs when the lung sacs, known as alveoli, fill with fluid and hinder breathing.

Respiratory system models are experimental systems that recreate aspects of human respiratory system development, function or disease. Animal models such as dog, rodent and pig can be used to ...

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Lungs are part of the respiratory system, a group of organs and tissues that work together ... At the end of each bronchiole is a cluster of little air sacs called alveoli. Alveoli are wrapped in tiny ...