Question

Which one of the following is a tendon-bone of the forelimb of a rabbit?
A. Onciform
B. Pisiform
C. Patella
D. Fabillae

Answer 1

Hint: The zoological name of the rabbit is Oryctolagus cuniculus. The rabbit is a member of the class Mammalia. It belongs to the order Lagomorpha. It belongs to the superclass Tetrapoda. Further, it belongs to the phylum Vertebrata or Chordata. These organisms have a notochord that changes into the vertebral column.

Complete answer: The forelimbs of vertebrates consist of various bones. These bones are the humerus, ulna, radius, metacarpals, carpals, digits and phalanges. The humerus is a single very long bone of the forelimb. It has a very large head fitting into the glenoid fossa. The anterior side of the humerus bone is elevated slightly into the ridges and crests. A sesamoid bone formed in the tendon is known as the pisiform. The pisiform consists of the distal row of bones. These bones include the first carpal, the second carpal, the third carpal known as the central, the fused fourth and fifth carpal that are known as capitate and hamate respectively. Thus, based on the above information, we can conclude that the pisiform is a tendon-bone of the forelimb of the rabbit.
Hence, the correct answer is option B.

Note: The rabbit belongs to the order Lagomorpha. Lagomorpha consists of animals that have different teeth in both their jaws. These animals are also known as gnawing animals. These animals show pseudo rumination or pseudo coprophagous. It means that these animals eat their own faecal matter. Rabbits are different from rodents as they have two extra incisors.