Refractive errors often are the main reason a person seeks the services of an optometrist or ophthalmologist. But what does it really mean when we're told that our vision is blurry because we have a refractive error? In order to see, we must have light. While we don't fully understand all the ...
Learn about the veterinary topic of Eye Structure and Function in Cats. Find specific details on this topic and related topics from the Merck Vet Manual.
Eye is like a camera.The external object is seen like the camera takes the picture of any object. Light enters the eye through a small hole called the pupil and is focused on the retina, which is like a camera film.
The size of the eye is around one inch in diameter, but it performs a key function i.e. eyesight. Among all the five senses, sense of sight is one of the ways that one uses to collect details about the surrounding environment.
Click on various parts of our human eye illustration for descriptions of the eye anatomy; read an article about how vision works.
Renal Artery – brings waste-filled blood from the aorta to the kidney for filtering in the nephron. Glomerulus – each glomerulus is a cluster of blood capillaries surrounded by a Bowman's capsule.
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WebMD's Brain Anatomy Page provides a detailed diagram and definition of the brain including its function, parts, and conditions that affect it.
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There are different brain parts and functions. Learn here which parts of the brain are involved in what functions.
Robert P. Lehr Jr., Ph.D. Professor Emeritus, Department of Anatomy, School of Medicine, Southern Illinois University. Español. Brain Function and Deficits
What is the structure of reticular activating system? Scientists have found out that the reticular activating system (RAS) comprise of two important parts known as the ascending reticular system and the descending reticular system.
When you go for a physical, your healthcare practitioner frequently orders blood tests. Many folks first find out they have hep C after undergoing a routine blood test and finding that one or more of the tests is abnormal.
Function. Humans and many animals do not look at a scene in fixed steadiness; instead, the eyes move around, locating interesting parts of the scene and building up a mental, three-dimensional 'map' corresponding to the scene (as opposed to the graphical map of avians, that often relies upon detection of angular movement on the retina).
Learn how to dissect a cow's eye in your classroom. This resource includes: a step-by-step, hints and tips, a cow eye primer, and a glossary of terms.
The central nervous system (CNS) includes the brain and the spinal cord. The CNS is protected by bones and the meninges (the dura mater, arachnoid and pia mater).
A horizontal cross section of the human eye, showing the major parts of the eye, including the protective covering of the cornea over the front of the eye.
The iris, visible through the clear cornea as the colored disc inside of the eye, is a thin diaphragm composed mostly of connective tissue and smooth muscle fibers. It is situated between the cornea and the crystalline lens.
The pineal gland, also known as the conarium, kônarion or epiphysis cerebri, is a small endocrine gland in the vertebrate brain.The pineal gland produces melatonin, a serotonin-derived hormone which modulates sleep patterns in both circadian and seasonal cycles.