The heart is enfolded within a space called the:

• A. pleural cavity
• B. pericardial cavity
• C. abdominal cavity
• D. cranial cavity

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by identifying the anatomical location of the heart within the body. The heart is located in the thoracic cavity, specifically in the mediastinum, which is the central compartment of the thoracic cavity.
2. Step 2: Understand the term 'cavity' in anatomy. A cavity refers to a space or hollow area within the body that houses organs. The heart is surrounded by a specific cavity that protects and supports it.
3. Step 3: Review the pleural cavity. This cavity surrounds the lungs and is lined by the pleura, a serous membrane. It does not house the heart.
4. Step 4: Examine the pericardial cavity. This is the space within the pericardium, a double-layered sac that encloses the heart. The pericardial cavity contains a small amount of serous fluid to reduce friction during heartbeats.
5. Step 5: Compare the other options (abdominal cavity and cranial cavity). The abdominal cavity houses organs like the stomach and intestines, while the cranial cavity houses the brain. Neither is related to the heart. Conclude that the correct answer is the pericardial cavity.