![]() Freezing or refrigeration is not necessary and may damage fragile tissues.Specimen will slowly dry out or become contaminated in zip-lock bags add a teaspoon of Specimen Holding Fluid to retain moisture.Store specimen in heavy-duty, zip-lock bags to minimize drying between dissections.For best results, observe the following storage procedures: Once the original package is opened, use specimen within one month. In sealed, original packaging, our preserved specimens are guaranteed to remain fully preserved and free of decay for 12 months from the date of purchase. The formaldehyde is then displaced, first with water and then with a glycol solution, to produce a moist, low-fume specimen which will not decay over time. Note: Preserved mammal heart specimens are initially treated with a formaldehyde solution, the best animal tissue fixative. This hands-on experience shows students the differences between and roles of the right side of the heart and the left side of the heart in a memorable way. Heart dissection reveals the intricacies required of a heart to pump blood. Observe how all the parts of an eye work together to allow you to take in a brilliant sunset, an exciting sporting event, or a scary movie. As you complete the dissection, see if you can figure out the specific function of each part of your eye. pulmonary vein, pulmonary artery & pulmonary trunk, To investigate how the eye works, you will dissect a sheep eye and observe its unique structure.aortic semilunar valve, bicuspid valve & tricuspid valve,.They'll discover the placements of parts such as the: With a scalpel in hand, elementary, middle, and high school students can learn so much about a mammal heart's internal anatomy. This plain preserved specimen can be used instead of a cow's heart for dissection labs. This mammal heart specimen will typically be from sheep however, a pig or goat heart may be substituted due to limited availability of sheep hearts. This cut will open another cavity of the eye.Many mammal hearts are similar to that of a human heart, which makes this dissection specimen great for studying both internal and external anatomy of the heart. Cut the eye in a frontal section (separating anterior and posterior). What is the name of the fluid that leaked out when the cornea was punctured? _ (Hint: Which cavity of the eye did you open?)ĩ. Puncture the cornea (pinned in the image below) with scissors or scalpel. The nerve is usually buried in fat, so it will take some work to expose it.Ībove: Posterior view of a cow eye with adipose tissue cut away to reveal the optic nerve.Ĩ. Cut the fat around the eye and remove it.ħ. Label the following structures on your illustration (alternatively, you may take a photo and label it on the computer).Ħ. Illustrate the outer eye in the space below.In your cow’s eye, the cornea may be cloudy or blue in color. When the cow was alive, the cornea was clear. Locate the covering over the front of the eye, the cornea.This tough, outer covering of the eyeball has fat and muscle attached to it. ![]() You should be able to find the sclera, or the whites of the eye. Obtain a preserved cow eye and place it on your dissection tray.Collect a dissection tray, scalpel, scissors, probes, and gloves.Label the following diagram showing a section of the cochlea with the structures listed. Label the following diagram with the structures listed below.ģ. Match the following items to their proper location.Ģ. Part 2: Review of Auditory and Equilibrium Anatomyġ. First region with axons from only the left side of both eyes Synapse between second and third order neuron in (in thalamus)į. Beginning of axons of retinal ganglion cellsĭ. In the boxes of the diagram below, place the appropriate letters with each labeled structure of the vision neural pathway.ī. On the diagram above, number the sequential path of lacrimal fluid.Ĩ. On the diagram of the lacrimal apparatus below, label the following structures:ħ. On the diagram above, number the structures light information is processed through beginning with the photoreceptors and ending with the cells carrying light sensory information to the thalamus in the optic nerve.Ħ. Below is a diagram of the cells in the retina. Label the following structures of the eye on the diagram below (superior view of the right eye).Ĥ. Below is a image of a microscopic section of the eye, magnified by 10x. Label the diagram of the eye below with the following structures:Ģ.
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