Question

Haversian system are found in the
A) Pigeon
B) Panther
C) Pipefish
D) Python

Answer 1

Hint:Haversian canal is found in the long bones of the mammals like humerus, femur, etc. These are the longitudinal canals that run in the wall of the long bones. They contain nerve fibres and one or two capillaries.

Complete answer:
>Haversian canals are interconnected by small transverse and oblique canals called Volkmann’s canals. >These canals contain branches of blood vessels, lymph vessels, and nerves in areolar tissue which supply nutrition and oxygen and receive metabolic wastes from the osteocytes.
>The matrix of the bone is arranged in the form of concentric rings called lamellae around each >Haversian canal and are called Haversian lamellae.
>There are numerous small spaces separating the lamellae which are called lacunae. Each lacunae gives branched processes canaliculi which join the canaliculi of adjoining lacunae to form a network.
>A Haversian canal with its lamellae, lacunae and canaliculi forms a Haversian system or osteon. The spaces between the Haversian systems are filled by interstitial lamellae.
>These haversian canals are found in the bones of animals like dogs, cats, panthers, etc. which belong to the class mammalia.
>Pipe fish is a subfamily of small fishes and belong to the class Actinopterygii.
>Pigeon is a bird that belongs to the class Aves.
>Python belongs to the class Reptilia.
>So the correct answer is Panther which belongs to the class Mammalia.

Hence the correct answer is option ‘B’.

Note:Long bones such as humerus, femur, etc. are hollow and each has a central cavity called marrow or medullary cavity but the small bones are solid.