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The lungs are the primary organs of the respiratory system in humans and most 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 air 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 earlier 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. Humans have two lungs, a right lung, and a left lung. They are situated within the thoracic cavity of the chest.

This GIF Bitmap Image Lunch Download HD is a part of Lunch Category in Food Folder. Lunch Download HD has a Resolution of 246x277 Pixels. Lunch Download HD is of .gif (Graphics Interchange Format) Format. It's Size is 27.9KB. This GIF has been Downloaded 58 times till now. Lunch Download HD was Added on 27-08-2021. Download Lunch Download HD by clicking the button below: