…adults. Here the posterior part of the iliac crest is thick, red marrow is abundant, and the distance to vessels and abdominal organs is large…

…The pericardial space (cavity) always contains a small amount of serous fluid which acts as a lubricant that prevents friction during ventricular contraction and relaxation…

…in which the heart and the roots of the great vessels are contained (Figure 1). The pericardial sac encloses the pericardial cavity which contains pericardial…