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 major types of lipids, Q. What are the major types of lipids? ...

Q. What are the major types of lipids? The main types of lipids are phospholipids, triglycerides (fats and oils), waxes and steroids.

Advantages of autonomous transactions, Advantages of Autonomous Transaction...

Advantages of Autonomous Transactions An autonomous transaction, once started is fully independent. It shares no locks, resources, or commit-dependency with the main transacti

Explain the systemic antibiotic cover, Explain the systemic antibiotic cove...

Explain the systemic antibiotic cover The need for  systemic antibiotic cover should be considered. The original protocols recommended an antibiotic such as amoxicillin 250 mg

Decreased performance of the removable prosthesis, Removable soft tissue-bo...

Removable soft tissue-borne partial dentures have one of the lowest patient acceptance rates in dentistry. Those patients wearing the partial dentures often exhibit greater mobilit

Maedi/visna, Maedi/visna Maedi, a progressive pneumonia, and visna, a n...

Maedi/visna Maedi, a progressive pneumonia, and visna, a neurotropic disease, found in sheep and goats are caused by the Maedi/visna virus, belonging to the family Retroviridae

Conjugation - patterns of sexual reproduction, Conjugation - Patterns of Se...

Conjugation - Patterns of Sexual Reproduction Conjugation is a temporary union among two individuals of the same species, during which the original macronucleus disintegrates,

Define about traumatic needles, Define about Traumatic needles Traumat...

Define about Traumatic needles Traumatic needles are needles with holes or eyes which are supplied to the hospital separate from their suture thread. The suture must be thread

How does the depolarization of the neuronal membrane start, Q. How does the...

Q. How does the depolarization of the neuronal membrane start? The primary cause of the neuronal depolarization is the binding of neurotransmitters released in the synapse by t

What is prophylaxis, Q. What is prophylaxis? The Prophylaxis is measure...

Q. What is prophylaxis? The Prophylaxis is measures taken to prevent diseases. For instance, the use of condoms in sexual relations is a prophylaxis against contamination by ag

What is an analogy for microtubules, What is an analogy for microtubules? ...

What is an analogy for microtubules? Microtubules have two major functions in cells and in doing so act such as a skeleton as well as like railroad tracks. Microtubules are the

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