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. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange. Respiration is driven by different muscular systems in different species. Mammals, reptiles and birds use their different muscles to support and foster breathing. In early tetrapods, air was driven into the lungs by the pharyngeal muscles via buccal pumping, a mechanism still seen in amphibians. In humans, the main muscle of respiration that drives breathing is the diaphragm. The lungs also provide airflow that makes vocal sounds including human speech possible.

People have two lungs, a correct lung, and a left lung. They are arranged inside the thoracic cavity of the chest. The correct lung is greater than the left, what offers space in the chest with the heart. The lungs together weigh around 1.3 kilograms (2.9 lb), and the privilege is heavier. The lungs are important for the lower respiratory plot that starts at the windpipe and branches into the bronchi and bronchioles, and which get air taken in through the directing zone. The leading zone closes at the terminal bronchioles. These separation into the respiratory bronchioles of the respiratory zone what partition into alveolar channels that bring about the alveolar sacs that contain the alveoli, where gas trade happens.

STRUCTURE

The lungs are situated in the chest on one or the other side of the heart in the rib confine. They are tapered fit as a fiddle with a thin adjusted peak at the top, and a wide curved base that lays on the raised surface of the diaphragm.[1] The pinnacle of the lung stretches out into the foundation of the neck, arriving at right away over the level of the sternal finish of the primary rib. The lungs stretch from near the spine in the rib pen to the front of the chest and downwards from the lower part of the windpipe to the diaphragm.[1] The left lung imparts space to the heart, and has a space in its boundary called the cardiovascular score of the left lung to oblige this.[2][3] The front and external sides of the lungs face the ribs, which make light spaces on their surfaces

RIGHT LUNG

The right lung has both more lobes and segments than the left. It is divided into three lobes, an upper, middle, and a lower lobe by two fissures, one oblique and one horizontal.

LEFT LUNG

The left lung is partitioned into two flaps, an upper and a lower projection, by the slanted gap, which stretches out from the costal to the mediastinal surface of the lung both above and beneath the hilum. The left lung, in contrast to one side, doesn't have a center projection, however it has a homologous component, a projection of the upper flap named the lingual.

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Regards
Jacqueline
Managing Editor
Journal of Anatomical Science and Research.