The lacrimal apparatus is the physiological system containing the orbital structures for tear production and drainage. It consists of: The lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the human eye; it is a j-shaped serous gland located in lacrimal fossa.

What are lacrimal glands where are they located write 5 function of tears?

The lacrimal gland is located within the orbit above the lateral end of the eye. It continually releases fluid which cleanses and protects the eye’s surface as it lubricates and moistens it. These lacrimal secretions are commonly known as tears.

What is the lacrimal apparatus structures in order as tears flow?

Tears are produced by the lacrimal gland and the accessory lacrimal glands and cover the cornea. Tears then drain out the punctum in the medial eyelids, flow down the canaliculi into the lacrimal sac. They then drain down the nasolacrimal duct into the nose at the inferior meatus (under the inferior turbinate).

Where are lacrimal glands located?

The tear glands (lacrimal glands), located above each eyeball, continuously supply tear fluid that’s wiped across the surface of your eye each time you blink your eyelids. Excess fluid drains through the tear ducts into the nose.

What divides the lacrimal gland into two parts?

Structure. The lacrimal gland is an almond-shaped structure, about 2 cm in length. The gland is split into two contiguous parts (lobes) by the lateral aponeurotic fibers of the levator palpebrae superioris muscle into an orbital part and a palpebral part.

Where is the lacrimal apparatus?

See lacrimal apparatus. A small pink fleshy structure situated in the inner canthus. The anterior margin of the fossa for the lacrimal sac located on the frontal process of the maxilla. See fossa for the lacrimal sac.

Where is the lacrimal apparatus located?

frontal bone
The lacrimal gland is a bilobed, tear-shaped gland with the primary function of secreting the aqueous portion of the tear film, thereby maintaining the ocular surface. It is primarily located in the anterior, superotemporal orbit within the lacrimal fossa of the frontal bone.

What is the function of lacrimal apparatus?

The lacrimal apparatus consists of the lacrimal glands, which secrete the tears, and the lacrimal sac and ducts, which convey the tears into the nasal cavity. Secretory function of the lacrimal glands declines with age, and many elderly individuals develop “dry eye” syndrome.

What is the first part of the drainage of the lacrimal apparatus?

Lacrimal canaliculi/canals These are small channels that lie in each eyelid, and commence at the puncta lacrimalia; small openings where the tears are drained from the surface of the eye. These canaliculi are divided into the superior duct and the inferior duct that drain into the lacrimal sac.

What is lacrimal drainage?

The lacrimal drainage system consists of the lacrimal puncta, inferior and superior canaliculi, common canaliculus, lacrimal sac, and nasolacrimal duct. It is classically divided into upper and lower portions.

What is the nasolacrimal duct?

The nasolacrimal duct (also called the tear duct) carries tears from the lacrimal sac of the eye into the nasal cavity. The duct begins in the eye socket between the maxillary and lacrimal bones, from where it passes downwards and backwards.