Sheep Eyeball Dissection Concepts

The video tutorial guides viewers through the dissection of a sheep's eyeball, highlighting key anatomical structures such as the optic nerve, cornea, sclera, and retina. The process involves removing surrounding tissues, making incisions, and examining the anterior and posterior halves of the eyeball. The tutorial also explains the function of the vitreous humor and the tapetum lucidum, a reflective layer found in nocturnal animals.

What is the first step in preparing the sheep's eyeball for dissection?

• Cutting the optic nerve

• Removing the cornea

• Splitting the eyeball into halves

• Trimming the fat and extraocular muscles

Why is it important to spread the structures away from the eyeball during dissection?

• To remove the optic nerve

• To make the eyeball larger

• To prevent cutting into important structures

• To change the color of the eyeball

What is the condition of the cornea after being in solution?

• It turns completely opaque

• It remains unchanged

• It becomes more translucent

• It becomes slightly opaque

What is the purpose of the vitreous humor in the eyeball?

• To provide nutrients

• To give the eyeball its shape

• To protect the optic nerve

• To change the color of the eye

What is the condition of the lens after being in solution?

• It turns completely transparent

• It becomes slightly opaque and rubbery

• It becomes more flexible

• It remains unchanged

What is the function of the pupil in the eye?

• To focus light

• To allow light to enter the eye

• To protect the retina

• To change the shape of the lens

What is the tapetum lucidum and its function?

• A layer that absorbs light

• A reflective layer that enhances night vision

• A protective layer for the retina

• A layer that changes eye color

Which animals typically have a tapetum lucidum?

• Diurnal animals

• Nocturnal animals

• Aquatic animals

• Herbivorous animals

What is the role of the retina in the eye?

• To change the shape of the eye

• To detect light and send signals to the brain

• To focus light

• To protect the lens

Why do humans not have a tapetum lucidum?

• Humans are not nocturnal

• Humans have a different eye structure

• Humans have a thicker cornea

• Humans have a larger retina