Question

Astragalus and calcaneum are part of:
A. Forelimb
B. Hindlimb
C. Scapula
D. Clavicle

Answer 1

Hint: Forelimb refers to the front limbs of an animal like flipper/foreleg et cetera. In the case of humans it refers to arms. Hind limb refers to the limbs present in the back. Therefore, in the case of humans, these are legs.

Complete Step by Step Answer:
Astragalus as shown in the figure provided below is one of the tarsal bones. It is located on top of the foot. It connects the foot with the lower leg bones:tibia and fibula. It is also called the ankle bone or talus. It is the second largest tarsal bone. It distributes the weight and pressure exerted by the lower leg bones to the ankle joint. It is articulated by smooth cartilage which makes the movement easier.
It is attached to ligaments too but not a single muscle.

Image: Location of Astragalus

The figure given below showcases calcaneus which is also known as the heel bone. It is the largest tarsal bone. It supports body weight. It is attached to the Achilles tendon which is the largest tendon in the body. It is situated right below the talus or astragalus bone.

Image: It shows foot representing Calcaneus, other bones and Joints

Thus, the correct answer is B:Hindlimb

Note: Tendon is a fibrous connective tissue that connects bone to muscle. Example: Achilles tendon binds calf muscles with the heel bone or calcaneum.
Overall, a foot contains 26 bones. Out of these there are 7 tarsal bones, all of them shaped irregularly. Other than this, 5 metatarsals and 14 phalanges. Each toe has 3 phalanges except the big toe which has only two.