COW EYE DISSECTION Use this presentation as your “virtual” cow eye dissection, or use it as a guide for your actual classroom dissection (recommended).

Slides:

Advertisements

Similar presentations

Safety  You’ll be using a scalpel to cut the eye, which can just as easily cut you!  Handling raw meat can be dangerous – wear gloves, and wash hands.

Advertisements

SHEEP EYE DISSECTION.

Frog Dissection.

LABORATORY NINE Special Senses

PETER REONISTO, MD MOORPARK COLLEGE

Eye Dissection photos Farmington Middle School October 9, th grade Science.

The cow eye Aqueous humor – clear fluid helps the cornea keep its rounded shape. – yellow on pict Optic disk – the place where all nerves from the retina.

The Eye Structure. External Parts of the Eye (Tear Duct)

Sheep’s Eye Dissection Inside & Out:

The Eye. Cross-section of an eye muscle optic nerve aqueous humour lens pupil iris cornea ciliary muscle vitreous humour blind spot retina sclera.

COW EYE DISSECTION. Cows Compared to Humans Without moving your head, look up. Look down. Look all around. Six muscles attached to your eyeball move.

EYE The eye is an extension of the brain

Sheep Eye Dissection Ms. Cox. Introduction Sheep Eye Dissection The anatomy of the human eye can be better shown and understood by the actual dissection.

Sheep Eye Dissection On the computer, open up the Google Presentation “Sheep Eye Dissection” that was shared with you Make a copy and share it with your.

Cow Eye Dissection Welcome to Cow Eye Dissection. This powerpoint was created to be downloaded and used with your students. Please feel free to edit.

Sheep Eye Dissection.

Sheep Eye Dissection.

HCT II Eye Dissection. 1. Cut the fat around the eye.

What are the parts of the eye? Let’s use a diagram to help us get familiar with the parts and pronounce them correctly!diagram parts.

Step-By-Step: Dissecting A Cow Eye. sclera cornea 1. Examine the outside of the eye. See how many parts of the eye you can identify. You should be able.

The Human Eye Structure & Function Abnormalities Dissection of the Eye

The Human Eye 6th Grade Science.

Part I: The Eye Part II: Sheep Eye Dissection

The Human Eye 6th Grade Science.

Eye dissection.

Frog Dissection.

Eye Dissection.

Lab 9 : Human Eye Anatomy Biology Department.

Anatomy and Function of Special Senses

Part I: The Eye Part II: Sheep Eye Dissection

What are the parts of the eye?

The Human Eye 6th Grade Science.

The Human Eye: Seeing Light

Lab 10 : Human Eye Anatomy Biology Department.

The Human Eye and Vision

C-Notes: Anatomy of the EYE

Why Dissect? Dissection allows students to: Practice safety procedures

COW EYE DISSECTION Use this presentation as your “virtual” cow eye dissection, or use it as a guide for your actual classroom dissection (recommended).

DO NOW Which body system did you find most interesting? Why? Date:

Exploring Anatomy: Sensory Organs Objective: To compare the anatomy of a sheep or cow eye with that of a human being Bell work: What are some ways.

The Eyes Have It!.

The Human Eye 6th Grade Science.

Chapter 12 Review Light and Vision.

Part I: The Eye Part II: Sheep Eye Dissection

Part I: The Eye Part II: Sheep Eye Dissection

Eye Structure iDiagram Activity.

Cow Eye Quiz Dissection 101: Click

The Human Eye 6th Grade Science.

The Human Eye 6th Grade Science.

The key to viewing visible light

Structure of the Eye Anterior Cavity: smaller cavity contained between the cornea and lens, filled with aqueous humour Sclera: white of eye acts as support.

The Human Eye 6th Grade Science.

Structures of the Eye and Sheep Eye Dissection Prep

EYE The eye is an extension of the brain

Lab: A Sheep’s Eye Purpose: To explore the anatomy of the eye.

SENSORY SYSTEM STRUCTURE OF THE EYE.

The Eye Choose and RECORD on your lab observation sheet-your

2. Cornea is Tough, clear covering over the iris and pupil that helps protect the eye. Light bend as it passes through the cornea. This is the first.

26 / 09 Tuesday Kuapapa: Dissect a cow’s eye to observe and describe the structure of eye.

Sheep Eye Dissection.

The Human Eye 6th Grade Science.

The Human Eye 6th Grade Science.

Presentation transcript:

COW EYE DISSECTION Use this presentation as your “virtual” cow eye dissection, or use it as a guide for your actual classroom dissection (recommended). If you are following along at school, please be careful. Scalpels and razors can cut you as easily as they cut cow eyes. You can order cow's eyes at a butcher shop or purchase them directly from a slaughterhouse. Try to get eyes with the muscles and fat still attached. If possible pick up the cow's eyes the day of the dissection, eyes are easier to cut when they are fresh.

MATERIALS NEEDED: -One cow's eye for every two participants. -One single-edged razor blade or scalpel -Scissors (optional) -Wax Paper and Paper Towels -Plastic garbage bag

STEP 1: EXAMINE EYE Examine the outside of the eye. See how many parts of the eye you can identify. You should be able to find the whites (or sclera) and the clear covering over the front of the eye (the cornea). You should also be able to identify the fat and muscle surronding the eye.

STEP 2: FIRST INCISION Make the first incision where the sclera meets the cornea. Cut until the aqueous humor is released.

STEP 3: CORNEA Rotate the eye and cut around the cornea. Be careful not to cut too deep or you may cut the lens. As the cornea starts to cut free, hold the cornea in the center and make the last cuts around it.

STEP 4: CORNEA Once you have removed the cornea, place it on the board (or cutting surface) and cut it with your scalpel or razor.

STEP 5: IRIS With the cornea removed, the next step is to pull out the iris. Place one finger in the center of the eye. Find the iris and pull it back. It should come out in one piece.

STEP 6: SCLERA It can be a bit tricky to remove the lens with the vitreous humor attached. It works best if you cut slits in the sclera. Be careful not to cut the lens.

STEP 7: LENS After enough incisions have been made in the sclera, you should be able to remove the lens. Sometimes the vitreous humor will be removed along with the lens.

STEP 8: EXAMINE LENS Hold up the lens and look through it. If the lens is too slippery, pat it dry and try again.

STEP 9: INSIDE OUT With the vitreous humor now removed, you should be able to turn the eye inside out.

STEP 10: RETINA The thin tissue on the back of the eye is the retina. Find the spot where the retina is attached. The shiny blue-green material is the tapetum.

STEP 11: OPTIC NERVE Find the spot where all the retina's nerves collect. It is called the blind spot. This is where all the nerves go out the back of the eye, forming the optic nerve.

STEP 12: OPTIC NERVE Return your attention to the outside of the eye. Locate the optic nerve. To see the separate fibers that make up the optic nerve, pinch the nerve with a pair of scissors or with your fingers.

STEP 13: CLEAN-UP Once the dissection is complete, properly dispose of the remains. They should be wrapped up in plastic and disposed of the same day. Also, if you used razor blades, they should be disposed of properly. (A blade is good for only one or two dissections.)