Question

Humerus bone is situated in
A.Thigh
B.Lower arm
C.Upper arm
D.Shank

Answer 1

Hint: Skeletal system is a system of external and internal, living or dead, hardened structures which form the supportive, protective and jointed framework of the body. Hard or flexible, internal or external structures of the animal body Such as bones and cartilage constitute the skeleton. The skeleton system is responsible for movement or locomotion of various body parts.

Complete answer:
The appendicular skeleton system includes the skeleton of the limbs, the pectoral and pelvic girdle which Support and suspend the skeleton of limbs from the vertebral column. The girdle which supports the forelimb is called pectoral girdle and the girdle which supports the hind limbs is called pelvic girdle. Hence, the bones of limbs, pelvic girdle and pectoral girdle constitute the appendicular skeleton. It is situated at the lateral sides which extends outwards from the principal axis.

Now let us find solution from given options:
A.Thigh: In humans, a pair of hind limbs are present. Each hind limb has 30 bones which form the thigh, shank, knee and foot. The single longest and strongest bone present in the thigh is called femur.
B.Lower arm: the bones present in the lower arm are ulna and radius. These two bones may be parallel to each other or cross each other. The radius is shorter than ulna.
C.Upper arm: in humans, a pair of forelimbs are present. Each forelimb is made up of 30 bones which make upper, lower and hand. The single long bone present in the upper arm is humerus.
D.Shank: The two bones present in the shank region are tibia and fibula. The 7 bones of the ankle are called tarsal, the 5 bones of the sole are called metatarsal and the 14 bones that form the toes are called phalanges

Hence, the correct answer is option (C)

Note: The hand has 27 bones where 8 bones are present in the wrist region, 5 bones are present in the pain region and 14 bones are present in fingers. The 8 bones of the wrist are called carpals, the 5 bones of the palm are called metacarpals and the 14 bones of the fingers are called phalanges