This lab guide provides instructions for dissecting the kidneys and reproductive organs of the rat. Cow eye, dissecting pan, dissecting kit, safety glasses, lab apron, and gloves. In this exercise we will be identifying these structures of the eye using a cow eye. Cow eye dissection worksheet answers worksheet fun and. There are several different ways you can use this lesson in the classroom. Someone else from quizlet did a great job on this not included, vitreous humor cypress college biol 231 general human anatomy human anatomy, second custom edition for cypress college by elaine n. Instructions include an eye diagram, a glossary, and color photos for each step. The cow eye is ideal because its large size makes for easy identification of the eye s components. Coweyedissection exercise cow eye dissection worksheet. A brief, descriptive walkthrough of a cow eye dissection.
This lesson plan gives easytofollow directions for dissecting a cow eye for you to use in your classroom. The lab guide for students outlines the procedure for the dissection and you can view the eye gallery to see photographs of the dissection. As you get closer to the actual eyeball, you may notice muscles that are attached directly to the sclera and along the optic nerve. Choose from 500 different sets of cow eye dissection flashcards on quizlet. This tough, outer covering of the eyeball has fat and muscle attached to it. Some of the worksheets for this concept are cows eye dissection, sheep eye dissection procedures, nervous system and sensory organs, cow eye dissection, dissection of the sheeps brain, mammalian heart dissection work, human eye and sense of sight pdf, lesson 3. Identify the sclera, the outer layer of tough, white dense irregular connective tissue. Using diagrams and clayplaydoh, students can create a. It includes stepbystep instructions as well as clear color photographs to help you identify parts. The white part is the sclera, the outer covering of the eyeball. You should be able to find the sclera, or the whites of the eye. A razor blade is only good for one or two dissections. Cut through the eye as shown on the instruction sheet.
Cow eye dissection is popular because of how similar a cow s eye is to the human eye. Also, the cow eyes can be rather slippery, so use caution when handling and cutting them. The blue is the cornea, which starts out clear but becomes cloudy after death. Cow eye, dissection instruments, dissection tray procedure and observations. The cow eye dissection is a great lesson to use as part of your unit on the nervous system and the five senses. Your guide to dissection since 1817 dissecting an eye before dissection, allow the students to a have a good look at the eye and see if they can identify any parts of the eye. The carolina mammal eye dissection guide is a general set of instructions for dissecting mammal eyes. The cow eye is a fantastic specimen for students of all ages to dissect. Name the three layers you sliced through when you cut across the top. Cow eye dissection worksheet mrs morritt science cow eye dissection background. In your cows eye, the cornea may be cloudy or blue in color. Download stepbystep instructions pdf file for doing your own cows eye dissection.
What is the function of these muscles and how do they affect vision. If the pdf does not display below, you may also download it here. Download stepbystep instructions pdf file for doing your own cow s eye dissection. First, identify the most external structures of the eye. Tell three observations you made when you examined the. Cow eye dissection andlabelby leslie youngsection 63 2.
Here you will find all we have for cow eye dissection worksheet answers. There are numerous grayishpink extrinsic eye muscles attached to the sclera, that allow the cow to move its eyeball up and down and from side to side. Locate the retina, the filmy, beige layer that lines the inside of the back of the. One eye of choice for dissection, that closely resembles the human eye, is that of the sheep. We use cookies to provide you with a great user experience. I ask the students to look at the back of their eye dissection worksheet while i finish handing out the eyes. Select a place to make an incision of the sclera midway between the cornea and optic nerve. When the cow is grazing, blades of grass may poke the cow s eyebut the cornea protects the inner eye.
The cornea is the transparent front part of the eye that coversthe iris, pupil, and anterior chamber. The eye most likely has a thick covering of fat and muscle tissue. Cow eye dissection worksheet cow eyes, dissection, eye. Feb 04, 2016 high ability unit 3 physics aqa eye lesson. In the cow eye it is opaque because of the preservative, but in life it is crystal clear because of a unique arrangement of proteins.
Student lab guide for dissecting a cow or a sheep eye. Get this resource as part of a bundle and save up to 41%. The structures have certain functions and together, they form images that are interpreted by the brain. Kit provides a stepbystep student guide with labeled color images for 1 or 2 students to participate in an introductorylevel dissection activity that includes locating and identifying external and internal features of the eye. Tell three observations you made when you examined the surface of the eye. Students discover the anatomy of a human body by dissecting a cows eye. This manual explains how to do a dissection of a cow or other mammalian eye. Including dissection activity to retrieve the lens with differentiated worksheets provided for this. From there, i direct students to eye dissection page 1 and begin to work through the page with the students. Fat around the backside of the eye can be left alone. Sheep eye dissection procedures the anatomy of the human eye can be better shown and understood by the actual dissection of an eye. Here is the cow eye dissection worksheet answers section.
Match the following parts of the eye to their function. The gelatinous fluid inside is the vitreous humor, the lens sits within this liquid. Flip the eye over to find the optic nerve where it exits out the back of the eye. When youre done dissecting the cows eye, wrap all the pieces of the eye in plastic and throw them away. Cow eye dissection by crazysciencelady teachers pay teachers. View notes cow eye dissection exercise from anatomy 23012004 at texas state technical college, harlingen. Also includes a diagram of the eye, fun facts, an activity on how to find your blind spot and all answer keys. What is the purpose of the fatty tissue surrounding the eye. Cow eye dissection guide central bucks school district. Turn the specimen so the cornea is on the left and the optic nerve is on your right. To download this video and access free educational materials, please visit. Its a clear lump about the size and shape of a squashed marble. Cow eye dissection lab lowell middlesex academy charter.
The structures have certain functions and together. Name the three layers you sliced through when you cut across the top of the eye. Apr 21, 2017 cow eye, dissecting pan, dissecting kit, safety glasses, lab apron, and gloves. Home procedure results and observations parts and functions interesting facts how to dissect a cow eye. Learn cow eye dissection with free interactive flashcards. The cornea, with the anterior chamberand lens, refracts light. The most noticeable part of the eye is the large mass of gray tissue that surrounds the posterior back of the eye and is attached to the. The structures are clear, dissection easy to accomplish and usually kids enjoy the lab. Coweyedissection exercise cow eye dissection worksheet 1. Once the students have their aprons and goggles on in the lab, i give each group a cow eye. Contains detailed instructions, images and an image for labeling the parts of the eye, such as the retina, tapetum, and optic nerve.
If you want to download the image of cow eye dissection worksheet answers together with cow eye diagram fresh cow eye dissection worksheet answers biology, simply right click the image and choose save as. This dissection guide was revised october 2014 with improved instructions and color images for a better dissection and easier identification of internal and. In this animal dissection lesson, students identify the structure of an eyeball by cutting open a cow eye and observing the insides. View lab report cow eye dissection worksheet from science na at monarch high school. You and your group will complete this worksheet as you are doing the cow eye. The eye is now in the position it would be in a body as you face the body. This cow eye dissection kit comes with everything you need to conduct a lab examination.
Cow eye dissection teachers guide the biology corner. The cow eye is ideal because its large size makes for easy identification of the eyes components. The mammalian eye consists of many specialized cells and tissues that make up several different structures. Cow eye dissection is popular because of how similar a cows eye is to the human eye. Locate the covering over the front of the eye, the cornea. Dissection of the cow eye please make sure to wear gloves and safety glasses when you are dissecting, and make sure to clean up thoroughly after the lab. Teachers guide to the cow eye dissection cow eye gallery. Cut away the fat and muscle, this may only be necessary if fat is covering the cornea of the eye and is in your way. It may be stuck to the cornea or it may have stayed with the back of the eye. Thats the vitreous humor, a mixture of protein and water. Mar 22, 2015 the cow eye dissection is a great lesson to use as part of your unit on the nervous system and the five senses. Puncture the cornea with scissors or a scalpel, aqueous liquid should leak out. Cow s eye dissection page 5 the back of the eye is. Cows eye dissection page 8 glossary aqueous humor a clear.
Appropriate for grades 47, i run this lab for each of the 4th grade classes at my school. Use the point of a very sharp razor blade to make a small cut through the sclera. The cow eye is an excellent specimen to use, because it is very similar to the human eye which makes comparing the structures very relevant. Keep cutting close to the sclera, separating the membrane that attaches the muscle to it. Rats are similar to other mammals and the same procedure would work for fetal pigs, minks, rabbits and other vertebrates.
These are the extrinsic muscles that allow a cow to move its eye up and down and from side to side. Find cow eye dissection lesson plans and teaching resources. Rotate the eye until the larger bulge or tear gland is on the top of the eye. The cow eye dissection lab what are the structures of the mammalian eye and how do they function. Biology dissection foldables collection bulk buy for 25% savings. Record 3 observations you made when you examined the surface of the eye. Differences between the two eye types will be mentioned as the dissection is completed. Here you will learn how to dissect a cow eye and follow the right steps to do it properly and easily. Cow eye dissection worksheet answers together with cow eye. Obtain a cow eye, dissection tray, and a bamboo stick to point out structures. Colored ring of muscle that changes the size of the pupil. Displaying top 8 worksheets found for cow eye disection.
The cow eye is also large which makes the dissection and identification simple, but very effective. View notes coweyedissection exercise from anatomy 23012004 at texas state technical college, harlingen. If you want to download the image of cow eye dissection worksheet answers together with cow eye diagram fresh cow eye dissection worksheet answers biology, simply right click the. Jul 26, 20 a brief, descriptive walkthrough of a cow eye dissection.
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