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

Illustrate the molecular composition of hemoglobin, Q What is the molecular...

Q What is the molecular composition of hemoglobin? Does the functionality of hemoglobin as a protein depend upon its tertiary or upon its quaternary structure? Hemoglobi

Genetic, Ask quesIn Cross 1, pure-breeding colored, starchy kernel plants (...

Ask quesIn Cross 1, pure-breeding colored, starchy kernel plants (C1Wx/C1Wx) were crossed to plants pure-breeding for colorless, waxy kernels (c1 wx/c1 wx). The F1 of this cross we

Doppler evaluation for constrictive pericarditis, Q. Doppler evaluation for...

Q. Doppler evaluation for constrictive pericarditis ? 2D Echocardiography and Doppler evaluation can provide valuable clues to the presence of constrictive pericarditis. M-Mo

Xenotransplantation, X e n o t r a n s p l a n t a t i o ...

X e n o t r a n s p l a n t a t i o n Over the past 20 years transplantation of heart and kidney has become almost a routine in human but the availability of

Explain elements of xylem in gymnosperms, The chief water conducting elemen...

The chief water conducting elements of xylem in gymnosperms are: 1. Vessels 2. Fibres 3. Transfusion tissue 4. Tracheids Tracheids

What is the meaning of schizogony, What is the meaning of Schizogony? A...

What is the meaning of Schizogony? A form of asexual reproduction found in some protozoans. An already multinucleated cell undergoes cell division which results in each daughte

Biological responses controlled by phytochrome, Biological Responses Contro...

Biological Responses Controlled by Phytochrome Phytochrome responses are those which are controlled reversibly by red and far-red light. These can be broadly categorised as:

Pituitary disorders, PITUITARY DISORDERS - (a) Pituitary Dwarfism . It...

PITUITARY DISORDERS - (a) Pituitary Dwarfism . It is caused by the deficiency of growth hormones (GH) from childhood. It is characterised by small but well porportioned body a

Explain the endocrine gland and the exocrine gland, What is the difference ...

What is the difference between the endocrine gland and the exocrine gland? Endocrine gland is a gland whose secretions (known as hormones) are collected by the blood and reach

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