The cow eye Aqueous humor clear fluid helps

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 join to form the optic nerve. (blind spot ) (small spot on the back of the retina). • Cones – light sensitive cells in the retina that are responsible for color vision in bright light.

• Cornea – a tough clear covering over the iris and pupil that helps protect the eye. • Iris – a colored muscle that controls how much light enters the eye (through the pupil). • Lens – a clear flexible structure that makes an image on the eye’s retina.

• Optic nerve – the bundle of nerve fibers that carry information from the retina to the brain. • Pupil – The dark oval in the center of a cow’s iris that lets light into the inner eye. • Retina –the layer of light-sensitive cells at the back of the eye that detects images from the lens.

• Rods – a second kind of light-sensitive cell in the retina. Rods repond to dim-light to form a black and white image. • Sclera – the thick, tough, white outer covering of the eyeball. • Tapetum – the colorful, shiny blue material located behind the retina. It reflects light back through the retina. • Vitreous humor – the clear liquid that gives the eyeball its shape. This liquid fills the sclera.

Ciliary muscles – – The ciliary muscles adjust the shape of the lenses in order to focus the eyes. – They control the shape of the lens and allow us to change from distance to close vision.

Vitreous humor

The Cow Eye • 8 min student fresh eye dissection • 15 min instructor dissection • interactive eye from exploratorium • 10 min cow eye dissection