Investigate how the eye works by dissecting a real cow eye. Students connect the functions observed to the structures within the eye. Register today!
Cost: $5 per student
Michigan Grade Level Content Expectations, Science v.1.09
- Design and conduct scientific investigations. (S.IP.05.12; S.IP.06.12; S.IP.07.12)
- Describe the physical characteristics (traits) of organisms that help them survive in their environment. (L.EV.05.12)
- Relate degree of similarity in anatomical features to the classification of contemporary organisms. (L.EV.05.21)
- Recognize that all organisms are composed of cells (single cell organisms, multicellular organisms). (L.0L.07.21)
- Explain how cells make up different body tissues, organs and organ systems. (L.0L.07.22)
Next Generation Science Standards
Students participating in this program will explore science content as stated in the Disciplinary Core Ideas. They will engage in science and engineering practices as they plan and conduct investigations to answer questions regarding the structure and function of the eye.
PS4.B: Electromagnetic Radiation
- Objects can be seen if light is available to illuminate them or if they give off their own light.
- An object can be seen when light reflected from its surface enters the eyes.
LS1.A: Structure and Function
- Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction.
LS1.D: Information Processing
- Different sense receptors are specialized for particular kinds of information, which may be then processed by the animal’s brain. Animals are able to use their perceptions and memories to guide their actions.
- Each sense receptor responds to different inputs (electromagnetic, mechanical, chemical), transmitting them as signals that travel along nerve cells to the brain. The signals are then processed in the brain, resulting in immediate behaviors or memories.
Cow Eye Disection Pre-visit Materials
During Your Visit to the ScienceWorks Lab students will be expected to:
- Sit in tables of 6 students and (at least) 1 adult
- Students should be prepared to give their attention to the Lab instructors when requested to “Give Me Five”
- Work cooperatively with one another at the table
- Follow the hands-on procedures just as the Lab teacher or assistant explains them
- Handle materials and equipment carefully
It is important that teachers and chaperones:
- Help to focus the students’ attention
- Assist students with the hands-on activities and experiments when necessary
- Turn off cell phones and pagers during the class
- Students will be expected to work in pairs to dissect a real cow eyeball and briefly use a razor
- Students will be expected to carefully follow the safety procedures for dissections
Aqueous Humor: A clear fluid that helps the cornea keep its rounded shape
Blind Spot: The place where all nerves from the retina join to form the optic nerve. Each eye has a blind spot where there are no light-sensitive cells.
Cornea: A tough, clear covering over the iris and the pupil that helps protect the eye. Light bends as it passes through the cornea; the cornea begins bending light to make an image.
Iris: A muscle that controls how much light enters the eye. It is suspended between the cornea and lens. A cow’s iris is always brown, while human irises may be brown, blue, green or gray.
Optic Nerve: The bundle of nerve fibers that carry information from the retina to the brain.
Pupil: The dark circle in the center of your iris. It is a hole that gets bigger or smaller, as the iris expands or contracts, to let light into the eye.
Retina: The layer of light sensitive cells at the back of the eye. The retina detects images focused by the cornea and the lens. The retina is connected to the brain by the optic nerve.
Tapetum: The colorful, shiny material located behind the retina which is found in animals with good night vision. The tapetum reflects light back through the retina to enhance the animal's night vision.
Vitreous Humor: The thick, clear jelly that helps give the eyeball its shape.
Cones: One kind of light-sensitive cells in the retina. Cones give you color vision in bright light.
Rods: One kind of light-sensitive cells in the retina; they work in dim light.