Question

Bone related with skull of rabbit is
a. Coracoid
b. Arytenoid
c. Pterygoid
d. Atlas

Answer 1

Hint:
Pterygoid extends from the sphenoidale of the skull to make a plate like structure. Above the pit of the scapula is - acromion and coracoid. Coracoid is sort of a hook and smaller than acromion projecting upwards. Atlas is the first neck bone. Arytenoid could be a cartilage that forms a part of the larynx.
> Coracoid - coracoid could be a paired bone and a part of the shoulder.
> Arytenoid – a pair of small three-sided pyramids forming a part of larynx, to which vocal cords are attached thus allowing in vocal cords movement
> Pterygoid – bone forming the palate (in the mouth). Pterygoid bones are two palatine bones extending downwards from both sides of the os sphenoidale within the skull.
> Atlas – is that the topmost vertebra and with the axis forms the joint connecting the skull and spine.

Complete answer:
Rabbits are small mammals in the family Leporidae of the order Lagomorpha

The skull is a bony structure within the head of most vertebrates that supports the structures of the face and forms a protective cavity for the brain. It has two parts: the cranium and the mandible.
Skull of the rabbit consists of cranium, sense capsules, upper jaw, lower jaw, and hyoid apparatus. It is a part of the skull where the brain is protected. It’s also called a brain box. Skull is dicondylic i.e. each exoccipital bears an occipital condyle to articulate with neck bone. It is divisible into three major regions: posterior occipital region ,parietal region, and anterior frontal region. The skull is tropibasic i.e. a vertical interorbital septum lies between two orbits in order that the cranium doesn't extend forward into the orbital region.

Skull of a rabbit has two parts: 1) Posterior cranial part- it's shorter and fairly well developed. 2) Anterior facial part- it's longer , deflected at an angle of about 60 degree and comprises mainly the jaws.

Occipital condyles are partly formed from basioccipital and exoccipital bones. The basioccipital forms the floor; Ssuppraoccipital forms the roof, and ex occipitals the two sides of foramen. On the rear side of the occipital region there are two knob like structures occipital condyles which articulate with the primary vertebra, atlas. On the posterior side of the cranium there's a large opening named hiatus, through which the brain emerges out as nerve cord. In between the dorsal bones, supraoccipital and parietals a little bone interparietal is present. Squamosal bone separates the occipital and parietal regions laterally. The skull of rabbit has three sorts of sensory capsules: The dorsal turbinals bear olfactory epithelium and middle, ventral turbinals covered by respiratory epithelium.

The arrangement of turbinals is dorsal (nasoturbinals), middle (Anterior a part of cranium is frontal region. It consists of six bones viz., two dorsal frontals, one ventral presphenoid, and two lateral orbitosphenoids. It's ventral basisphenoid, dorsal two parietal and lateral two alisphenoids. Ahead of the occipital region the parietal region of the cranium is present. Anterior margin of the cavity is closed by ethmoturbinals and maxillo turbinates. The cavities of olfactory capsules are separated by a partition called mesethmoid. Three pairs of much folded process called turbinals project into the olfactory capsules. These increase the interior surface of the olfactory capsules. They’re dorsally covered by a pair of nasals, ventrally by a pair of vomers, and laterally by pre maxillae, maxillae and palatines. A pair of olfactory capsules is present ahead of the frontal region of the cranium.

The two optic capsules are separated by a skinny vertical partition called interorbital septum. Such a skull with interorbital septum is described as tropi basic skull. Optic capsule has dorsal frontals; anterior maxilla and a lacrymal; posterior squamosal and alisphenoid; and external zygoma. They are two large sockets on the perimeters of the frontal segment of the cranium. Optic capsules are referred to as orbits.

On the outer side of periotic bone a flask shaped bone is present. The basal swollen a part of the tympanic is termed as tympanic bulla, and also the upper part is thought as external external auditory canal. At the junction of tympanic bulla and external acoustic meatus a skinny eardrum is present. The outer wall of petrous has two openings: the anterior fenestra vestibuli and posterior round window. The outer a part of periotic is mastoid. It produces mastoidal lying ahead of the paroccipital process. The periotic has a petrous portion which encloses the inner ear. Each capsule is made by a periotic bone. It’s formed by the union of three embryonic bones: prootic, epioptic and opisthotic.

Maxilla consists of two halves. Each half is created of six bones; •Premaxilla • Maxilla • Jugal • Palatine • Pterygoid • Squamosal.

So, the correct answer option c, pterygoid.

Note: Male rabbits are called bucks; females are called does. Another term for a young rabbit is bunny. A bunch of rabbits is understood as a colony or nest. A gaggle of baby rabbits produced from one mating is mentioned as a litter, and a gaggle of domestic rabbits inhabitation is named a herd.