Illustrate about human eyes, Biology

Assignment Help:

Eyes

We have a pair of eyes. They are held in socket of the skull by four rectus muscles and two oblique muscles. These muscles control the movements of the eyes. The wall of the eye ball is composed of an elastic layer. In front this layer is transparent, called the cornea; the rest is opaque, called the sclera. In front, the sclera is covered by a very thin layer called conjunctiva. The next layer lining the inner surface of the sclera is uveal tract. Uveal tract has three parts, the part in front is a circular diaphragm, called iris and aperture of this diaphragm is called pupil. The inner most layer of the eye is nervous layer which is called retina. It is composed of visual nerve endings for reception and transformation of light stimuli.

1939_biology.png

 


Related Discussions:- Illustrate about human eyes

What are the etiological agents of malaria, Q. What are the etiological age...

Q. What are the etiological agents of malaria? The etiological agents of malaria are protozoans of the genus Plasmodium. There are four different kinds of plasmodia that cause

Seed coat effects, Seed Coat Effects In some seeds dormancy is impose...

Seed Coat Effects In some seeds dormancy is imposed by the presence of the seed coat; if this is removed, the seed germinates. Two possible types of mechanisms could be invol

Explain pollen grains, Transfer of pollen grains from the anther to the sti...

Transfer of pollen grains from the anther to the stigma of another flower of the similar plant is known as? Geitonogamy

Peristaltic movements of the intestines, Q. Which is the kind of muscle tis...

Q. Which is the kind of muscle tissue that performs the peristaltic movements of the intestines? The smooth muscle tissue is responsible for the peristaltic movements of the in

Digestion of nucleic acids, Digestion of Nucleic Acids Several nuclease...

Digestion of Nucleic Acids Several nucleases present  in  the  pancreatic juice  like RNAase and  DNAase  digest various nucleic acids- These enzymes  are endonucleases which h

Skeletal system - vertebral column, VERTEBRAL COLUMN - It is curved ...

VERTEBRAL COLUMN - It is curved vertical about 70 cms. long. It consists of 33 vertebrae (after fusion 26). It shows 4 curvatures - (i) Cervical curvatures

Cell, The scientist who described cells as “many little boxes” was

The scientist who described cells as “many little boxes” was

Define terpene alcohols - non glyceride fractions, Define Terpene Alcohols ...

Define Terpene Alcohols - non glyceride fractions? Partly free, partly esterified e.g. ferulic acid; these are found in significant amounts in rice bran oil, wheal germ oil, so

Other complications in prosthetic valves, Other Complications :  Bioprosth...

Other Complications :  Bioprosthetic valves have a tendency for degeneration, calcification or cusp perforation. Current models have overcome many of these problems. Calcification

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