Muscle relaxants are medications that are used to help relax the muscles and can be used to help reduce pain that comes from strains, sprains, cramp and muscular injuries. They can also help to combat general stress and can be used to aid sleep (and even to prevent sleepwalking).
The left lung has an indentation, called the cardiac depression, for the normal placement of the heart. Behind this is the hilum, through which the blood vessels, lymphatics, and bronchi enter and leave the lung.Air travels from the nasal passages to the pharynx, larynx, and trachea.hat part of the lung that is not covered by pleura and through which blood vessels, bronchi, nerves and lymphatics enter and leave the lung. lung lobe torsion. occurs uncommonly in dogs and cats, most often of the right middle lobe. May occur spontaneously, following trauma, or in association with pleural effusion.
Bronchi: The bronchi are the two air tubes that branch off of from the trachea and carry atmospheric air directly into the lungs. Lungs: The main organ of the respiratory system is lungs. Lungs are the site in body where oxygen is taken into and carbon dioxide is expelled out.ntroduction to parts of the respiratory system and their function. Respiratory system consists of the organs that help to breathe. Respiration also known as breathing is the process which delivers oxygen from the external atmosphere to the body and removes the carbon dioxide from body and expels out.