Fill in the blanks: 1. The heart is located in the thoracic cavity and is surrounded by serous membranes called parietal and visceral _______________(membrane). This is called the ________________ sac, which is a true caity containing fluid surrounding the heart. 2. The lungs are located in the thoracic cavity which is surrounded by serous membranes called parietal and visceral___________(membrane). The very thin space in between the two; it's only a slight space, enough for the thin serous fluid, which reduces______________. 3. The brain is located in the ____________ cavity, while the spinal cord is located in the _______________. They are both lined by serous membranes called ______________________.
Fill in the blanks:
1. The heart is located in the thoracic cavity and is surrounded by serous membranes called parietal and visceral _______________(membrane). This is called the ________________ sac, which is a true caity containing fluid surrounding the heart.
2. The lungs are located in the thoracic cavity which is surrounded by serous membranes called parietal and visceral___________(membrane). The very thin space in between the two; it's only a slight space, enough for the thin serous fluid, which reduces______________.
3. The brain is located in the ____________ cavity, while the spinal cord is located in the _______________. They are both lined by serous membranes called ______________________.
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