Question

Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.
(A)Sternum and ribs - Axial Skeleton
(B)Clavicle and glenoid cavity - Pelvic girdle
(C)Humerus and ulna - Appendicular skeleton
(D)Malleus and stapes - Ear ossicles

Answer 1

Hint: The glenoid cavity or glenoid fossa of the scapula is associated with that body part that has a ball and socket joint and helps in rotation or arm in circular or to and fro movement.

Complete answer:
The glenoid cavity is the part of the head of the humerus which is associated with the shoulder. The clavicle cavity is also connected with the shoulder. The pelvic girdle is associated with hip bones and connects the pelvic region of the spine. Pelvic girdle composed of fused bones identified individually as the ilium, ischium, and pubis.

Additional Information: -The axial skeleton is that part of the skeleton that consists of the bones of the head and trunk of a vertebrate. within the human skeleton, it consists of 86 bones and consists of six parts; the skull (22 bones), the ossicles of the center ear, the hyoid, the rib cage, the sternum, and therefore the spinal column.
- The appendicular skeleton includes the skeletal elements within the limbs, also supporting the shoulder girdle pectoral and pelvis. The humerus is that the single bone of the upper arm, and also the ulna (medially) and the radius (laterally) are the paired bones of the forearm.
- The ossicles are three bones in either tympanic cavity that are among the tiniest bones within the human body.typically refer to the malleus, incus, and stapes (hammer, anvil, and stirrup) of the center ear.
So, the correct answer is ‘Clavicle and glenoid cavity - Pelvic girdle’.

Note: At birth, humans have around 300 individual bones but the number reduces with increasing
age as most of the bones start fusing with each other. A normal healthy adult has around 206
individual bones when its growth is completed.