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The dark blue, teal, and gold tapetum lucidum from the eye of a cow Retina of a mongrel dog with strong tapetal reflex. The tapetum lucidum (Latin for 'bright tapestry, coverlet'; / t ə ˈ p iː t əm ˈ l uː s ɪ d əm / tə-PEE-təm LOO-sih-dəm; pl.: tapeta lucida) [1] is a layer of tissue in the eye of many vertebrates and some other animals.
The canoe-type tapetum is formed by two walls divided by a median gap, where the nerves exit; it is found in many families, including Theridiidae, Clubionidae, and Amaurobiidae. [2] The grate-type tapetum is the most efficient; the long vitreous body and spherical lens combine to produce a sharp, in focus image.
The tapetum lucidum, in animals that have it, can produce eyeshine, for example as seen in cat eyes at night. Red-eye effect, a reflection of red blood vessels, appears in the eyes of humans and other animals that have no tapetum lucidum, hence no eyeshine, and rarely in animals that have a tapetum lucidum. The red-eye effect is a photographic ...
A layer of reflective tissue behind the retina called the tapetum lucidum also increases visual acuity in low light. Our pups also have better hearing than we do. Humans can only hear frequencies ...
Reflectors made of alternating layers of flat guanine crystals (refractive index, n = 1.83) and cytoplasm (n ≈ 1.33) have evolved independently in fish scales and in the tapeta of the eyes of elasmobranchs (Gur 2017). The tapetum of the bush-baby, Galago crassicaudatus, has a similar structure, but with crystals of riboflavin (n = 1.73).
You’ve heard of Rudolph’s red nose, but did you know that reindeer have glowing eyes that help them find food in the dark?
Tapetum (botany), tissue within the sporangium (especially the anther), which provides nutrition for growing spores . The innermost wall of microsporangium; Tapetum lucidum, a reflective tissue layer associated with the retina of some vertebrates; Tapetum of corpus callosum, a section of the corpus callosum in the brain
Microsoft founder Bill Gates is telling his “origin story” in his own words with the memoir Source Code, being released on Feb. 4 "My parents and early friends put me in a position to have a ...