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Select the correct option:...

Select the correct option:

A

There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.

B

8th, 9th and 10th pairs of ribs articulate directly with the sternum.

C

11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.

D

Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the types of ribs and their attachment to the sternum and vertebral column, we can break down the information step by step. ### Step-by-Step Solution: 1. **Understanding the Types of Ribs**: - There are three main types of ribs based on their attachment: - **Vertebro-sternal ribs**: These are the first 7 pairs of ribs that are directly attached to the sternum. - **Vertebro-chondral ribs**: These are the next 3 pairs (8th, 9th, and 10th) that are not directly attached to the sternum but are connected to the 7th rib via cartilage. - **Floating ribs**: These are the last 2 pairs (11th and 12th) that do not attach to the sternum at all. 2. **Analyzing the Options**: - **Option 1** states: "There are 7 pairs of vertebro-sternal, 3 pairs of vertebro-chondral, and 2 pairs of vertebral ribs." This is correct as it accurately describes the rib classification. - **Option 2** states: "8, 9, and 10 pairs of ribs are directly attached to the sternum." This is incorrect because these ribs are connected to the 7th rib, not directly to the sternum. - **Option 3** states: "11 and 12 pairs of ribs are connected to the sternum with the help of hyaline cartilage." This is also incorrect as these ribs are floating and do not connect to the sternum at all. - **Option 4** states: "Each rib is flat, thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum." This is incorrect as it misrepresents the attachment of the ribs. 3. **Conclusion**: - After evaluating all the options, it is clear that **Option 1** is the correct answer.
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