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The Lungs are usually viewed in two sections, the Gas Movement section, and the Gas Exchange section. The right lung is significantly larger, having three Lobes, than the left lung, with only two lobes. This is because the left ventricle of the heart sits slightly to the left side of the thorax taking some of the space the lung would otherwize have had. The lungs are withing a cavity in the thorax called the Pleural Cavity and are surrounded by a bouble membrane called the Pluaral Membrane. The inner layer of the pleural membrane is called the visceral layer and is continuous with the alveoli of the lung, the outer layer is called the perietal layer. To follow a gas molecule breathed in would take you first down the Bronchus (there is one on each side, for each lung) then through a network of Bronchioles until it came to an Alveolar Duct. Up to this poin has been purely the gas movement section and all but the both the bronchi and bigger bronchioles have carticalge arounf them and smoothe muscle to control airflow. The alveolar ducts lead into Alveolar Air Sacs that look very much like bunches of grapes. This is where the gas exchange takes place across the very thin cells of the sacs into (and out of) the blood. So maximise the volumes of gas exchanged means you require as much of a surface area as possible and the of all the alveoli together is aound the same as half a tenis court. There is always some air within the alveoli because if there wasnt the fluid lining them would cause such a great surface tension that the sacs would never open again.
Two spongy, saclike organs in the chest cavity.
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∙ 9y ago
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∙ 11y agoWiki User
∙ 11y agoThere are a pair of lungs in the thoracic cavity - the left lung and the right lung. The left lung is slightly smaller (because of the heart which is slightly to the left of the body) and has two lobes and the right lung is bigger with three lobes. They are spongy and elastic organs that are broad at the bottom and taper at the top. They consist of air sacs, the alveoli. Many alveoli group together and open into a common space. From this space arise the alveolar ducts which join together to form bronchioles. The bronchioles connect them to the respiratory tract. The lungs also have blood vessels that are the branches of the pulmonary artery and veins.
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∙ 14y agoThe lungs are responsible for the intake of air, and distributing the air and it's properties to the rest of the body, as well as filtering it and taking out harmful substances. The mucus membranes that line the nose, mouth, throat have mucus that traps dirt and foreign matter that we may breathe in. Tiny hairs (cilia) beat back and forth to quickly filter out any junk (I am not sure what you meant by "Features of the lungs" so if you need more info, let me know, I just told you what I had in my head, not much, but it is a start! Plenty of places to look on the internet under "Anatomy of the Lungs"... Ashes2ashes73
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∙ 15y agoEsophages cause the air goes down treachea. Brochioles and bronchi. LUNGS.
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∙ 12y agopharynx,trachea,epiglottis,larynx,vocal chords,bronchioles,and blood cells
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∙ 11y agothe most obvious feature is their beautiful green eyes. its nice to pay your lungs some attention. they have feelings just like me and you.
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∙ 13y agoIt helps us breath,
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∙ 11y agoLungs are a dark slaty grey.
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