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Mature red deer stag, Denmark Red deer at the beginning of the growing season. Antlers are extensions of an animal's skull found in members of the Cervidae (deer) family.Antlers are a single structure composed of bone, cartilage, fibrous tissue, skin, nerves, and blood vessels.
Once the antler has achieved its full size, the velvet is lost and the antler's bone dies. This dead bone structure is the mature antler. In most cases, the bone at the base is destroyed by osteoclasts and the antlers eventually fall off. [62] As a result of their fast growth rate antlers place a substantial nutritional demand on deer; they ...
A deer (pl.: deer) or true deer is a hoofed ruminant ungulate of the family Cervidae (informally the deer family). Cervidae is divided into subfamilies Cervinae (which includes, among others, muntjac , elk (wapiti), red deer , and fallow deer ) and Capreolinae (which includes, among others reindeer (caribou), white-tailed deer , roe deer , and ...
The adult Indian muntjac (Muntiacus muntjac) is a solitary animal, other than during the rut (mating season) and for the first six months after giving birth. Adult males in particular are widely separated. Marking grass and bushes with secretions from their preorbital glands appears to be involved in the acquisition and maintenance of territory ...
Diagram of a human eye; note that not all eyes have the same anatomy as a human eye. The mammalian eye can also be divided into two main segments: the anterior segment and the posterior segment. [10] The human eye is not a plain sphere but is like two spheres combined, a smaller, more sharply curved one and a larger lesser curved sphere.
The find is a toe bone of a giant deer, about six centimeters long, four centimeters wide and three centimeters thick. On one side it features an angular line pattern of six engravings up to three centimeters long. Another pattern of four short engravings has been worked into the lower area. The bone can be placed vertically.
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The ring is in the fibrous outer layer of the eye, called the sclera. The structure is commonly referred to as the sclerotic ring; but, because the word sclerotic often implies pathology of the sclera ( see " sclerosis ", an unrelated medical condition [ 2 ] ), recent authors have urged avoiding the use of this term, to avoid confusion and to ...