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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.
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.
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.
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]
To put it simply, the "horns" are said to be growing at the bottom of the skull, where the head bends to look down at a cell phone—human bodies are physically adapting to use modern technology.
Cutaneous horns can effectively grow anywhere on the body, including private areas, but are more common on sun-exposed areas like the head, ears, back of the hands, forearms, neck, or shoulders.
Rams have larger horns than ewes. The horns in two-horned sheep, and the lower horns in four-horned animals, grow in a spiral shape. The rostral set of horns usually extend upwards and outwards, while the caudal set of horns curls downwards along the side of the head and neck. On polycerate animals it is preferred that there is a fleshy gap ...
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