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The Shetland is a small, wool-producing breed of sheep originating in the Shetland Isles, Scotland, but is now also kept in many other parts of the world. It is part of the Northern European short-tailed sheep group, and it is closely related to the extinct Scottish Dunface .
A true endoskeleton is derived from mesodermal tissue. In three phyla of animals, Chordata, Echinodermata and Porifera (), endoskeletons of various complexity are found.An endoskeleton may function purely for structural support (as in the case of Porifera), but often also serves as an attachment site for muscles and a mechanism for transmitting muscular forces as in chordates and echinoderms ...
Shetland cattle are used as beef cattle in speciality, niche markets. These cattle are usually kept on small-scale farms that rely on a high income from sales and low maintenance costs for feed. The cattle are also still kept by a very small number of self-sufficient people in Shetland. [12]
Most echinoderms are able to reproduce asexually and regenerate tissue, organs and limbs; in some cases, they can undergo complete regeneration from a single limb. Geologically, the value of echinoderms is in their ossified dermal endoskeletons , which are major contributors to many limestone formations and can provide valuable clues as to the ...
A skeleton is the structural frame that supports the body of most animals.There are several types of skeletons, including the exoskeleton, which is a rigid outer shell that holds up an organism's shape; the endoskeleton, a rigid internal frame to which the organs and soft tissues attach; and the hydroskeleton, a flexible internal structure supported by the hydrostatic pressure of body fluids.
The Shetland Pony is a very small, robust breed of pony. Shetlands range in size from about 710 to 1070 mm, with an official maximum height at the withers (1200 mm for American Shetlands). Shetland Ponies have heavy coats and short legs, and are considered quite intelligent. They are a very strong breed, used for riding, driving, and pack purposes.
Discarded exoskeleton of dragonfly nymph Exoskeleton of cicada attached to a Tridax procumbens (colloquially known as the tridax daisy)An exoskeleton (from Greek έξω éxō "outer" [1] and σκελετός skeletós "skeleton" [2] [3]) is a skeleton that is on the exterior of an animal in the form of hardened integument, which both supports the body's shape and protects the internal organs ...
While the Shetland still excels at herding, today it is often raised as a working dog or family pet. [2] The Shetland's origins are obscure, but it is not a direct descendant of the Rough Collie, which it largely resembles. Rather, the Shetland is a descendant of small specimens of the Scottish Collie and the King Charles Spaniel.