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[2] Aristotle's lantern in a sea urchin, viewed in lateral section. The mouth of most sea urchins is made up of five calcium carbonate teeth or plates, with a fleshy, tongue-like structure within. The entire chewing organ is known as Aristotle's lantern from Aristotle's description in his History of Animals (translated by D'Arcy Thompson):
Aristotle’s lantern is a complex system of jaws and muscles which are capable of a variety of feeding types including suspension feeding, herbivory and detritivory feeding, and occasionally predation. Adaptations to this lantern have allowed sand dollars to live in habitats which have fine, shifting substrates.
The green sea urchin occurs in tropical waters in the western Atlantic Ocean. The subspecies occupy different geographical areas. L. v. variegatus occurs in the Caribbean Sea, southern Florida, the Yucatán peninsula and northern Brazil but not Barbados while L. v. carolinus is found from North Carolina southwards to the Caribbean Sea and Gulf of Mexico.
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The red sea urchin (Mesocentrotus franciscanus) [1] is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California.It lives in shallow waters from the low-tide line to greater than 280 m (920 ft) deep, [2] and is typically found on rocky shores sheltered from extreme wave action in areas where kelp is available.
The Isagoge (Greek: Εἰσαγωγή, Eisagōgḗ; / ˈ aɪ s ə ɡ oʊ dʒ iː /) or "Introduction" to Aristotle's "Categories", written by Porphyry in Greek and translated into Latin by Boethius, was the standard textbook on logic for at least a millennium after his death.
The structure of Rhetoric to Alexander is quite similar to that of Aristotle's work. [4] Chapters 1-5 deal with arguments specific to each of the species of rhetoric corresponding to the first book of Aristotle's work. Chapters 6-22 are about "uses" what Aristotle calls "topics", discussing them in the latter part of his second book.
The works of Aristotle, sometimes referred to by modern scholars with the Latin phrase Corpus Aristotelicum, is the collection of Aristotle's works that have survived from antiquity. According to a distinction that originates with Aristotle himself, [ citation needed ] his writings are divisible into two groups: the " exoteric " and the ...