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In some breeds and in some individuals, horns may grow towards the head, eventually causing injury. Horns may become broken, causing blood loss and potential for infection. Horned animals may become trapped in fences or vegetation, causing self-injury. Horned animals may become more aggressive than those without horns, especially around feed.
A pair of horns on a male impala Anatomy of an animal's horn. A horn is a permanent pointed projection on the head of various animals that consists of a covering of keratin and other proteins surrounding a core of live bone. Horns are distinct from antlers, which are not permanent.
Planorbarius corneus, common name the great ramshorn, is a relatively large species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral or left-coiling shells.
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Two-horned rams typically have horizontal double-curled horns. Four-horned rams have two vertical centre horns which may be 61 cm (2 ft) or more in length, and two smaller side horns, which grow down along the sides of the head. The horns on the ewe are smaller in diameter, shorter in length and appear more delicate than those of the ram. [26]
In 1825 Alexander Riley was the first Australian breeder to obtain a poll ram with a view to establishing a poll Merino flock. The ram was imported by him from Germany, along with Saxon ewes. Boonoke, Bungaree, Uardry and Wanganella studs made specific mention of "poley" or poll rams for sale from the early 1880s.
Antler comes from the Old French antoillier (see present French : "Andouiller", from ant-, meaning before, oeil, meaning eye and-ier, a suffix indicating an action or state of being) [3] [4] possibly from some form of an unattested Latin word *anteocularis, "before the eye" [5] (and applied to the word for "branch" or "horn" [4]).
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs.Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instead of copper-based hemocyanin. [3]