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Questions and Answers
Which of the following ribs is classified as a true rib?
Which of the following ribs is classified as a true rib?
- 8th rib
- 6th rib
- 10th rib
- 12th rib (correct)
Which of these features distinguishes the visceral pleura from the parietal pleura?
Which of these features distinguishes the visceral pleura from the parietal pleura?
- Houses a large volume of serous fluid
- Insensitive to pressure, pain, and temperature (correct)
- Covers the internal surface of the thoracic cavity
- Sensitive to muscle movement
What is the function of the pleural cavity?
What is the function of the pleural cavity?
- Circulates oxygen throughout the thoracic cavity
- Provides nutrients to the lungs
- Contains serous fluid to lubricate the pleura (correct)
- Generates mucus to trap pathogens
How are the 8th, 9th, and 10th pairs of ribs attached anteriorly?
How are the 8th, 9th, and 10th pairs of ribs attached anteriorly?
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Which statement about the floating ribs is true?
Which statement about the floating ribs is true?
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The parietal pleura is sensitive to which of the following?
The parietal pleura is sensitive to which of the following?
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Study Notes
Ribs
- The ribs are classified into three groups based on their relationship to the sternum.
- True ribs are the upper 7 pairs that are attached anteriorly to the sternum by their costal cartilages.
- False ribs are the 8th, 9th, and 10th pairs that are attached anteriorly to each other and to the 7th rib by means of their costal cartilages.
- Floating ribs are the 11th and 12th pairs that are short ribs that do not attach to the sternum at all.
Rib Cage
- The rib cage consists of 12 pairs of ribs, classified into true, false, and floating ribs.
- The 1-7 pairs are true ribs.
- The 8-10 pairs are false ribs.
- The 11-12 pairs are floating ribs.
Pleura
- The pleura is a serous membrane that lines the lungs and thoracic cavity.
- It permits efficient and effortless respiration.
- The pleura is divided into two parts: visceral and parietal.
Structure of the Pleura
- Visceral pleura covers the outer surface of the lungs and extends into the interlobar fissures.
- Visceral pleura is insensitive to pressure, pain, and temperature.
- Parietal pleura covers the internal surface of the thoracic cavity.
- Parietal pleura is sensitive to pressure, pain, and temperature.
- There is a potential space between the visceral and parietal pleura, known as the pleural cavity.
- The pleural cavity contains a small volume of serous fluid to lubricate the surfaces of the pleura.
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