few lines about the lungs
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The lungs are the primary organs of the respiratory system in humans and many other animals including a few fish and some snails. In mammals and most other vertebrates, two lungs are located near the backbone on either side of the heart.
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Few lines about lungs?
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◇The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax).
◇The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi.
◇The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.
◇During gas exchange oxygen moves from the lungs to the bloodstream.
◇At the same time carbon dioxide passes from the blood to the lungs.
◇This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
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