Which of the following statements is NOT true about the shape, position, and location of the heart?a. The heart is enclosed in a double-layered sac called the pleural membrane. b. Approximately two-thirds of the heart is found to the left of the midline. c. The heart is located between the two lungs within the mediastinum. d. The heart is shaped like a cone with the base facing the right shoulder.

The heart is covered in double membranous sac called pleural membrane, this statement is incorrect.

Explanation:

The heart is covered by a double walled sac called pericardium.The pericardium fixes the heart to the mediastinum and encloses the heart and the root of great vessels. It has two layers serous membrane and fibrous membrane. The fibrous membrane is the most superficial layer of the pericardium. It is made up of dense and loose connective tissue. The serous membrane is divided into two layers, the parietal layer, which is fused to and inseparable from the fibrous membrane, and the visceral layer, which is part of the epicardium.

Between these two membranes is the pericardial fluid, which is filled with serous fluid which protects the heart from any kind of external shock. 

answer:

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