Roots of Yggdrasil

Roots of Yggdrasil

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Roots of Yggdrasil
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27 Of The Most Epic Things Stored In The Smithsonian – Chaostrophic

27 Of The Most Epic Things Stored In The Smithsonian – Chaostrophic

The most beautiful creature - WTF fun facts

The most beautiful creature - WTF fun facts

Fungi - http://flickr.com/photos/45245591@N03/6210199823

Fungi - http://flickr.com/photos/45245591@N03/6210199823

Eye showing the inner surface of the iris, pupil, and ciliary processes. The lens was removed to show the posterior surface of these structures. The iris regulates the amount of light that enters the pupil by changing its size and it is what gives the eye its color. SEM **On Page Credit Required**

Eye showing the inner surface of the iris, pupil, and ciliary processes. The lens was removed to show the posterior surface of these structures. The iris regulates the amount of light that enters the.

Retina. Andy Fischer (2008). This image of a chick's retina reveals the three basic stages of visual processing by the circuit in the eye that detects light and transforms it into signals the brain can understand. At the top of the image are the retina's photoreceptor cells (in gray)--the familiar rods and cones--that capture photons of light and translate them into electrical currents.

Vertical section of a chick retina [source] Domestic chicks have a tetrachromatic colour vision, while humans have a trichromatic one. In fact in a chick retina there are four types of.