Which one of the following is the correct description of a certain part of a normal human skeleton?
Which one of the following is the correct description of a certain part of a normal human skeleton?
Parietal bone and the temporal bone of the skull are joined by fibrous joint
First vertebra is axis, which articulates with the occipital condyles
The $9^{\text {th }}$ and $10^{\text {th }}$ pairs of ribs are called the floating ribs
Glenoid cavity is a depression to which the thigh bone articulates
Solution
Immovable or fixed or fibrous joints are found between the skull bones. No movement occurs at these joints. So, parietal bone and the temporal bone of the skull are joined by fibrous joint.
Invertebrates, the first vertebra is called atlas, while the second vertebra is axis. In humans, first seven pairs of ribs are called true rubs; $8^{\text {th }}, 9^{\text {th }}$ and $10^{\text {th }}$ pairs of ribs are false ribs while $11^{\text {th }}$ and $12^{\text {th }}$ pairs of ribs are called floating ribs.
Glenoid cavity is a socket-shaped cavity in the scapula (shoulder bone) that holds the head of the humerus in a ball and socket joint.