parts of the eye and their functions pdf

The pupil looks like a black dot in the middle of the eye. %PDF-1.4 %�� If it is too bright, the iris will shrink the pupil so that they eye can focus more effectively. 2. Main Function: Contains the light receptors. Light enters the eye through the cornea. There are several physical and chemical … This allows the eye to take in more or less light depending on how bright it is around you. 0000003488 00000 n The dome-shaped layer protects human eye from elements against entering in the inner parts of the eye. This gives them a larger field of view for avoiding predators. H�tT�n�0��+�HMҢ�hu)��Pe�R��H��o�/��]�Jd'��)��,�y��&�M�i�}�e>qU�?/hY@3&�[@g�g�� 0��K2��Jh��=��T҂�R|��A�ƌiI~��w�:ll� Z��MZ��Ҭ �fw��[�!a�q��2_�@��L�B��³�V�~%d��؎ The pupil looks like a black dot in the middle of the eye. The iris is the area of the eye that contains the pigment which gives the eye its color. Contact Lenses Vs. Iris: It is the pigmented, coloured portion of the eye, visible externally. This quiz/worksheet combo will help gauge your understanding of the eye, its parts, and their functions. ... Parts of the Microscope and Their Function If your eye become dry then it causes itchy and painful. The bony orbit and fat … On their … It acts as a sort of relay station for auditory … Fish form and function: Eye Features Related Article|Get Rid of Swollen Eyelid| Symptoms, Causes and Treatment, Main Eye Parts and their Functions| Human Eyes Functions, Get Rid of Swollen Eyelid| Symptoms, Causes and Treatment, Home Remedies For Swollen Eyes and Symptoms Causes, Eyelid Bumps or Blisters on Eyelid| Types, Causes, Symptoms & Treatment, A Holistic Approach To Natural Eye Health. Although fish species can look very different from one another due to various adaptations, their body parts serve similar functions. It keeps our eyes moist and clear and provides lubrication by secreting mucus and tears. 0000000016 00000 n The _____is also known as the white of the eye. Flounder are a group of flat-lying saltwater fish that live on the sea floor near the coast. The pupil dilates depending … Parts of the heart and its functions. Main Function: It carries impulses from eye to the brain. Having been constructed in the 16th Century, Microscopes have revolutionalized science with their ability to magnify small objects such as microbial cells, producing images with definitive structures that are identifiable and characterizable. The light focuses by lens onto the retina and it is located in the back of the eye. Human eyes have complex and highly specialized visual systems. 0000003185 00000 n There are many Eye Parts which work together to accomplish vision. 0000008588 00000 n First, the purpose of a microscope is to magnify a small object or to magnify the fine details of a larger object in order to examine minute specimens that cannot be seen by the naked eye. Retina: The retina is the light-sensitive tissue at the back of the . The surface of the eye and of the inner eyelids is covered by a clear, protective membrane called the “conjunctiva.” It is connected to the optic nerves that transmit the images to the brain so they can be interpreted. These parts include: The Conjunctiva. Compositional parts and their functions . <<55cc32f65ad6b942bbb098ac0dbdad49>]>> Fig.1.2: Parts of Human Eye A. Sclera: The knowledge of eye parts and functions is both useful and interesting. The eye transmits visual stimuli to the brain for interpretation and, in doing so, functions as the organ of vision. The film in the camera functions as the retina. x�b```�)��(�� æ��00ɽ}�].�6ɴ�N��ǲM�v�*d*��n I2�w@T�y�`��j Microscope Parts and Functions Microscope One or more lenses that makes an enlarged image of an object. Often considered the smallest brain part. 0000002946 00000 n The iris . Main Function: The main function of cornea is to properly focus on light. It also helps the eye to focus as light passes through. Cornea: The front transparent part of the sclera is called cornea. These glands are the layers of mucus which help keep the outside of the eye moist. There are seven extraocular muscles – the levator palpebrae superioris, superior rectus, inferior rectus, medial rectus, lateral rectus, inferior oblique and superior oblique. endstream endobj 21 0 obj<> endobj 23 0 obj<> endobj 24 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC/ImageI]/ExtGState<>>> endobj 25 0 obj<> endobj 26 0 obj<> endobj 27 0 obj<> endobj 28 0 obj[/ICCBased 45 0 R] endobj 29 0 obj[/Indexed 28 0 R 255 46 0 R] endobj 30 0 obj<> endobj 31 0 obj<> endobj 32 0 obj<> endobj 33 0 obj<> endobj 34 0 obj<>stream startxref 0000007375 00000 n You should be able to ﬁnd the whites (or sclera), the tough, outer covering of the eyeball. Fill in the blanks 1. Lacrimal glands are located in the outer corner of eye. The iris is a ring of muscles in the central part of the eye, that is helpful in regulating the amount … 20 0 obj<> endobj The sclera is the white part of the eye, forming an outer layer that protects everything inside, while the choroid is the layer of the eye that lies between the retina and the sclera. 0000008060 00000 n adjusts the size of the pupil and controls the amount of light that can enter the eye. Its muscles contract and relax to alter the size of its central hole or pupil. When hatched though, flounder look like most It consists of the following parts: Sclera: It is the outer covering, a protective tough white layer called the sclera (white part of the eye). Usually 10 X magnification. It also collects and guides sound waves into the middle ear. The cornea is the outer layer covering of the eye. It is convex and transparent. Function of the cornea Because the cornea is as smooth and clear as glass, but is strong and durable, it helps the eye in two ways: 1. The _____ is the transparent front part of the eye. Quiz questions ask about eye structure, composition, and vision. Have students trace their bodies on large sheets of paper. Each of your eyes is also shaped like a ball. The pupil is the centermost part of the eye, which is usually dark. When we talk about parts of the brain and their functions, brain stem should never be … 20 27 So, what are microscopes? The extraocular muscles are located within the orbit, but are extrinsic and separate from the eyeball itself. The lens of the eye bends and refracts light, directing it toward the retina. ��EZK�HX#&��딧,N��_w.jZV �>��G�T��3c�G��v��S'O�2[_4��[�.��JY�6��h��G99�؞��l��-+*l�xKa��ɵ�r)Y�e侚f��d� ��oVi�,8�ީɺV��(�49�,B壙w�N�=,�|�x�.r��I��j��T��pV˗�&T1�`��1��'�(�ײv8��j�S,�. 0000004779 00000 n It carries impulses for sight from the retina to the brain. Materials: • Computer with Internet access • “Your Eyes” KidsHealth.org article • “Parts of the Eye” handout • Pencil or pen. Main Function: It focuses light onto the retina. The eye has a tough transparent cover called cornea The colored part is the iris In the middle of the iris is the pupil At the back of the pupil is the lens 4. Science 3 parts of the eye 1. It helps to shield the rest of the eye from germs, dust, and other harmful matter. xref 0 Glasses: Which Provides Better Vision. 0000001160 00000 n Many outer particles enter in eyes from dust and these glands flush out particles which irritate the eye. 8/7/2018 2 ... #9 Eye Piece—The part you look at with your eye. The cornea shares this protective task with the eyelids, the eye socket, tears, and the white part of the eye (sclera). Other parts of the eye include the aqueous humour, a liquid which sits in a chamber behind the cornea, and the vitreous humour, the clear gel that fills the space between the lens and the retina. See how many parts of the eye you can identify. 2. 0000001339 00000 n The function of the eyebrows is to protect the anterior aspect of the eyeball from sweat, dust and other foreign bodies. It has bundle of sensory neurons at back of the eye. This black area is actually a hole that … The various parts of the eye perform different functions that contribute to this purpose. Pupil. The Eyelids (Palpebrae) and Eyelashes: The eyelids are two movable folds situated above and below front of the eye. COW’S EYE dissection page 3 Examine the outside of the eye. 0000012007 00000 n This eye part is the protective, outer layer of the eye. 0000011391 00000 n %%EOF eye. Class Time: • 30 minutes. The iris is the Pigmented area of eye that decides the color of eyes. They act to control the movements of the eyeball and the superior eyelid.. These glands produce tears which help in moisturizing the eye and save it to become dry. (Table 4.12). Activity: Today we’re going to learn all about the different parts of the eye … 0000006115 00000 n It is widely known that we can find four chambers inside the heart: two atria and two ventricles. The main function is to refract the light along with the lens. It refracts light bends it and enters the eye. Pinna (ear flap) Pupil. 0000000836 00000 n Here are a few examples: Flounder. 0000014676 00000 n The lens placed directly behind the pupil a transparent, bi-convex and flexible disc. The eye is roughly analogous to a self-regulating, self-cleaning camera. Prey fish, on the other hand, often have eyes on the sides of their bodies. Visit an eye care unit or clinic with your friends and teacher to For example, fish predators often have eyes facing forward in order to provide better depth perception. That’s why it is called eyeball 2. As we see everything around us or in the universe through the eye and Eye Parts. These Eye Parts keep the structures smooth for vision safe and secure from infection and injury. Microscopes are instruments that are used in science laboratories, to visualize very minute objects such as cells, microorganisms, giving a contrasting image, that is magnif… Pupil: The pupil is the opening at the center of the iris. The human heart is shaped by different parts whose coordinated action allows the pumping of blood. Here are the main Eye Parts of human eye by which a human can see around himself. Iris. 0000002247 00000 n The Midbrain. Some of the worksheets for this concept are Teachers guide vision grades 3 to 5, The human eye, Teachers guide vision prek to grade 2, Ear parts and functions work, Parts of the eye work answers, Grade 3, Lesson 3, Guide to eye level math. Contract and relax to alter the size of its central hole or.. Universe through the eye and their Function a ball area of the eye is sur- rounded a! 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