Question

Which one of the following items gives its correct total number?

• A. Types of diabetes - 3
• B. Cervical vertebrae in humans - 8
• C. Floating ribs in humans - 4
• D. Amino acids found in proteins - 16

Answer 1

The correct option is C Floating ribs in humans - 4

There are 12 pairs of ribs. First seven pairs of ribs are called true ribs. Dorsally, they are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage. The 8${}^{th}$, ${}^{th}$ and 10${}^{th}$ pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. These are called vertebrochondral (false) ribs. Last 2 pairs (11${}^{th}$ and 12${}^{th}$) of ribs are not connected ventrally and are therefore, called floating ribs.