What are the functions of the eyelids, Biology

Assignment Help:

What are the functions of the Eyelids?

Functions of the Eyelids:

The eyelid makes the outer most layers, covering the eye. Because of its strategic position, the eyelid serves a very important function of acting as a physical barrier between the eye and the external environment. This barrier protects the eye from physical elements including heat, radiation, excessive light and most importantly a foreign particle (referred to as a "foreign body"), which could physically damage the delicate inner coats of the eye if the eyelids were not there. Their protective functions include blinking to remove dust particles. The eyelashes play n sensory role to detect the presence of an intruding element, which in turn initiates the protective mechanisms, i.e., blinking.

The eyelids play an important role in maintaining the health of the ocular surface and the physical position of the eye within the orbit. The significance of the lids in relation to the tear film needs to be clearly emphasised. Production of tears, reflex blinking to aid in distribution of tears, and closing of the eyelids which cause propulsion of tears in the direction of lacrimal puncta to facilitate drainage of the tears are among the most significant roles played by the eyelids. The lacrimal pump responsible for the filling and emptying of the lacrimal sac is intricately linked to the movement of the eyelids.


Related Discussions:- What are the functions of the eyelids

Culturing, ime day 0 day 1 day 3 day 4 day 5 day 7 count ...

ime day 0 day 1 day 3 day 4 day 5 day 7 count blank 7 10 5 14 9 8 low 45&49 64&70 62&69 75&79 80&82 68&72

Biodynamic dealing with energetic of organisms, Biodynamic: This dealing w...

Biodynamic: This dealing with energetic of organisms. Biodynamic is a method of organic farming which treats farms as unified or individual organisms, emphasizing balancing the ho

Avian infectious bronchitis (ib), A v i a n infectious bronchitis (IB) ...

A v i a n infectious bronchitis (IB) An acute, highly contagious respiratory disease of chicken caused by a member of the family Coronaviridae, IB was first recognized in I

What is criminal law, What is criminal law? Criminal law: A crime ...

What is criminal law? Criminal law: A crime is an offence against society that accepted behaviours and is illegal by law. These all persons accused are prosecuted through

Working of serotonergic cell bodies, Q. Working of serotonergic cell bodies...

Q. Working of serotonergic cell bodies? The major site of serotonergic cell bodies is in upper pons and the midbrain, specifically the median and dorsal raphe nuclei and to a l

What is ascaris, What is ascaris? What is the disease caused by this worm? ...

What is ascaris? What is the disease caused by this worm? Ascaris, or Ascaris lumbricoides, is an animal of the nematode phylum, i.e., a roundworm. Ascaris causes ascariasis, a

GRADE 8 SCIENCE, what effects do human technologies have on our water syste...

what effects do human technologies have on our water systems?

Artificial inspiration, Artificial Inspiration : a. After artificial exp...

Artificial Inspiration : a. After artificial expiration, the rescue worker should slowly release the pressure on the back of the victim. b. This will cause the chest cavity t

Explain the ecological approach in taxonomy, Explain the Ecological Approac...

Explain the Ecological Approach in Taxonomy You already known that the use of ecological data in classification has been used since the time of Plato who considered aquatic, te

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd