The lungs are the primary organs of respiration 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 musculoskeletal systems 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 primary muscle that drives breathing is the diaphragm. The lungs also provide airflow that makes vocal sounds including human speech possible.
Lung (Standard Tibetan: རླུང rlung) means wind or breath. It is a key concept in the Vajrayana traditions of Tibetan Buddhism and has a variety of meanings. Lung is a concept that's particularly important to understandings of the subtle body and the Three Vajras (body, speech and mind). Tibetan medicine practitioner Dr Tamdin Sither Bradley provides a summary:
The general description of rLung is that it is a subtle flow of energy and out of the five elements (air, fire, water, earth and space) it is most closely connected with air. However it is not simply the air which we breathe or the wind in our stomachs, it goes much deeper than that. rLung is like a horse and the mind is the rider, if there is something wrong with the horse the rider will not be able to ride properly. Its description is that it is rough, light, cool, thin, hard, movable. The general function of rLung is to help growth, movement of the body, exhalation and inhalation and to aid the function of mind, speech and body. rLung helps to separate in our stomachs what we eat into nutrients and waste products. However its most important function is to carry the movements of mind, speech and body. The nature of rLung is both hot and cold.
Lung is an organ for breathing.
Lung(s) may also refer to: