The irregularly shaped area between the lungs tha contain the trachea is called the

Irregularly shaped area betweenthe two lungs, contains thetrachea. Diaphragm. muscular sheet that contracts to enlarge the thoracic cavity and draw air in. Pleura. Each lung is surrounded by a double layer serous membraneknown as pleura.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.