Acidity. Our stomach produces acid to digest the food that we eat. This is a regular and natural process. Whenever we eat, cells within the lining of the stomach pump acid to liquefy your sumptuous dinner, from mash potatoes to a slab of steak.ur stomach produces acid to digest the food that we eat. This is a regular and natural process. Whenever we eat, cells within the lining of the stomach pump acid to liquefy your sumptuous dinner, from mash potatoes to a slab of steak.
2. Thoracic cavity: thoracic means chest, this cavity is located in the anterior portion of the body and the mediastinum. It contains the cavity that surrounds the breast bone and ribs. Containing the lungs, heart, trachea, larynx and bronchial tubes.
The lungs occupy most of the space in the thoracic cavity. The heart sits between the right and left lung. The lungs are soft and spongy because they are mostly air spaces surrounded by the alveolar cells and elastic connective tissue. Each lung is enclosed by a double-layered serous membrane, called the pleura.The visceral pleuron is firmly attached to the surface of the lung. Visceral pleura is continuous with the parietal pleura that lines the wall of the thorax. The small space between the visceral and parietal pleurae is the pleural cavity.he lungs occupy most of the space in the thoracic cavity. The heart sits between the right and left lung. The lungs are soft and spongy because they are mostly air spaces surrounded by the alveolar cells and elastic connective tissue. Each lung is enclosed by a double-layered serous membrane, called the pleura.