Multiple Choice
The two layers of the pericardium produce and release serous fluid into the pericardial sac. Which of the following best describes these layers?
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1. Introduction to Anatomy & Physiology
Organization of the Body: Serous Membranes
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In the context of serous membranes, the loose-fitting sac around the heart is the:
A
Dura mater
B
Pleura
C
Pericardium
D
Peritoneum
Verified step by step guidance1
Step 1: Understand the function of serous membranes. Serous membranes are thin layers of tissue that secrete serous fluid to reduce friction between organs and body walls during movement.
Step 2: Identify the specific serous membranes associated with different organs. For example, the pleura surrounds the lungs, the peritoneum lines the abdominal cavity, and the pericardium encloses the heart.
Step 3: Recognize that the dura mater is not a serous membrane but rather a tough membrane that covers the brain and spinal cord.
Step 4: Recall that the loose-fitting sac around the heart, which reduces friction as the heart beats, is called the pericardium.
Step 5: Conclude that among the options given, the pericardium is the correct serous membrane that forms the sac around the heart.
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