(January 2015) A dividend reinvestment program or dividend reinvestment plan (DRIP) is an equity investment option offered directly from the underlying company. The investor does not receive quarterly dividends directly as cash; instead, the investor's dividends are directly reinvested in the underlying equity.
The thoracic cavity is the more superior subdivision of the anterior cavity, and it is enclosed by the rib cage. The thoracic cavity contains the lungs and the heart, which is located in the mediastinum.The diaphragm forms the floor of the thoracic cavity and separates it from the more inferior abdominopelvic cavity. The two pleural cavities are situated on both sides of the body, anterior to the spine and lateral to the breastbone. 2  The superior mediastinum is a wedge-shaped cavity located between the superior regions of the two thoracic cavities.
The thoracic cavity contains three internal chambers: a single pericardial cavity and a pair of pleural cavities (Figure 1-11a). These cavities are lined by shiny, slippery serous membranes. The heart is surrounded by the pericardial cavity. The relationship between the heart and the cavity resembles that of a fist pushing into a balloon (Figure 1-11b). The wrist corresponds to the base (attached portion) of the heart, and the balloon corresponds to the serous membrane that lines the pericardial cavity. The serous membrane is called the pericardium. The layer covering the heart is the visceral pericardium, and the opposing surface is the parietal pericardium.