Question

Gland found in the eye of Rabbit is
A. Meibomian gland
B. Perineal gland
C. Lacrimal gland
D. Harderian gland

Answer 1

Hint: Rabbits are the small mammals. Different glands are present for the protection of the eye. Some are paired and some are unpaired glands. Meibomian is not a paired gland whereas lacrymal and harderian glands are paired.

Complete answer:
Rabbits have spherically shaped eyeballs, attached to the orbit by six eye muscles. The cornea is bulged slightly and covered by conjunctiva. They have movable upper and lower eyelids. Nictitating membrane lies in the anterior cornea of the eye called canthus. The vascular coat consists of the choroid and the pupil can be constricted/ dilated. Iris is without pigments. They have a solid, crystalline, biconvex lens. Vision is usually monocular. Glands present are meibomian, lacrimal gland, and harderian gland.
1. The meibomian glands, also known as tarsal glands, are modified sebaceous glands, opening into the edges of the eyelid which hold a film of tears over the cornea. These are exocrine glands.
2. Perineal glands are the paired glands, found near the anus.
3. Lacrimal glands are the paired glands that produce tears to nourish the cornea and to kill bacteria.
4. Harderian gland is present in the eye orbit of animals with a nictitating membrane and lubricates and moistens the eye.

Therefore, the gland(unpaired) found in the eye of the rabbit is option A, i.e., Meibomian gland.

Note: Sometimes the meibomian gland gets blocked and the meibomian cyst will develop in such cases. The accumulation of fluid secretions within the gland is caused by impaction or by the presence of the tumour. The gland may rupture and the freed fluid will irritate the eye. Treatment is available for the cyst in medical science.