Question

In rabbit, hard palate is formed of
A. Premaxilla, vomer and dentary bones
B. Premaxilla, maxilla and palatine bones
C. Sphenoid, nasal and dentary bones
D. Nasal, maxillary and ethmoid bones

Answer 1

Hint: The hard palate is a thin horizontal bony plate in the roof of the mouth made up of two facial skeleton bones and is made up of bone. It doesn't move. The soft palate is made up of muscle fibres that are bound by a mucous membrane. It can be raised during swallowing to close the pharyngeal isthmus, preventing the food bolus from entering the larynx.

Complete answer:
The palate is divided into two categories: hard palate and soft palate. The anterior portion of the palate is known as the hard palate. In humans, it is made up of the Maxilla and Palatine bones. It is made up of premaxilla, maxilla, and palatine bones in rabbits. Palatine rugae are projections or transverse ridges that can be found on the ventral surface of the hard palate. During mastication, these rugae keep the food from slipping out of the buccal cavity.

Carnivorous species have well-developed rugae. The nasopalatine duct has one pair of openings at the anterior part of the hard palate in rabbits, which link the buccal cavity to the nasal passage. The nasopalatine duct, also known as Jacobson's gland, contains several olfactory receptors. It alerts them to the scent of food as they chew.

Thus from the above discussion, it can be concluded that the correct answer is option ‘B’ that is ‘Premaxilla, maxilla and palatine bones.’

Note:
- Except while swallowing, the rabbit's epiglottis is engaged over the soft palate, and the rabbit is an obligate nasal breather.
- Rabbits have two sets of incisor teeth, one of which is positioned behind the other. This distinguishes them from rodents, with which they are often confused.
- The teeth of a rabbit never stop growing. as the rabbit chews on grasses, wildflowers, and vegetables, they gradually wear down, ensuring that they never get too long.