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

Determine which is most stable, Hydrogen ( H) has 1 electron, carbond ( c) ...

Hydrogen ( H) has 1 electron, carbond ( c) has 6 electrons ; oxygen ( O) has electrons, Nitrogen ( n) HAS 7 electrons. Use the octet rule to determine which of the following is mos

Instances of human diseases caused by bacteria, Q What are instances of hum...

Q What are instances of human diseases caused by bacteria? Some human diseases caused by bacteria are tuberculosis, pertussis, diphtheria, gonorrhea, bacterial meningitis, bubo

What are the major gas exchange organs of the plants, What are the major ga...

What are the major gas exchange organs of the plants? How is the procedure accomplished? In covering of the leaves and of the primary structure of the stem gas exchange is made

What is the difference among systole and diastole, What is the difference a...

What is the difference among systole and diastole Systole and diastole are the two stages into which the cardiac cycle is separated. Systole is the stage when the contraction o

What is glycolysis in cell metabolism, What is Glycolysis in Cell Metabolis...

What is Glycolysis in Cell Metabolism? Glycolysis :  is the process that breaks down glucose into pyruvate and energy. Glycolysis does not require the presence of oxygen and

Aceolomates, what are phylums included in aceolomates?

what are phylums included in aceolomates?

Genotypically and phenotypically, 1. In the human, normal pigmentation ( A ...

1. In the human, normal pigmentation ( A ) is dominant to albinism ( a ). What results would be expected from the following matings, both genotypically and phenotypically? AA x

Estimation of burn area, Estimation of Burn Area: The  estimation of  ...

Estimation of Burn Area: The  estimation of  the  extent  of  burn area expressed as  the  percentage  of  the surface  area  of  the skin  burnt to  the  total body  surface

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