Question

Which of the following bones are not found in the human appendicular skeleton?
A. Finger bones
B. Upper arm bones
C. Jaw bone
D. Ankle bones

Answer 1

Hint: Our entire body is formed around the hard framework of the skeleton. This hard framework is the combination of muscles and bones along with the joints, ligaments, tendons and cartilage. Axial and appendicular skeleton are the two divisions of the skeletal system.

Complete Step by Step Answer:
The axial skeleton comprises 80 bones whereas the appendicular skeleton comprises 126 bones. The appendicular skeleton supports the attachment of the axial skeleton. This includes limbs and their associated girdles (pelvic and pectoral). Each limb comprises 30 bones. The forelimb (hand) comprises humerus, radius and ulna, the 8 wrist bones i.e; carpals, the 5 palm bones i.e; metacarpals and 14 digits i.e.; phalanges (fingerbones). The hind limb (leg) comprises femur, tibia and fibula, the 7 ankle bones i.e; tarsals, the 5 metacarpals and 14 digits i.e; phalanges. The patella is the knee hone that covers the knee ventrally.

The jaw bone is the largest and strongest bone which is included in the human facial skeleton (axial skeleton). The jaw bone holds the teeth in place. The mandible forms the lower jaw whereas the maxilla forms the upper jaw.

Thus, the correct answer is option C:- Jaw bone


Note: The pectoral girdle is the shoulder girdle and it is the point of attachment of the upper arm with the axial skeleton. The pelvic girdle has attachment with the lower limb that carries the whole weight of our body. It also helps in locomotion.