Tail

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For added uses, see Tail (disambiguation).

A lion's tail

The tail is the area at the rear end of an animal's body; in general, the appellation refers to a distinct, adjustable appendage to the torso. It is the allotment of the physique that corresponds almost to the sacrum and coccyx in mammals and birds. While cape are primarily a affection of vertebrates, some invertebrates including scorpions and springtail, as able-bodied as snails and slugs, accept tail-like appendages that are sometimes referred to as tails.

Function

Animal cape are acclimated in a array of ways. They accommodate a antecedent of locomotion for fish and some added forms of marine life. Many acreage animals use their cape to besom abroad flies and added bitter insects. Some species, including cats and kangaroos, use their cape for balance, and some, such as New World monkeys and opossums, accept what is accepted as a prehensile tail. This is a blazon of appendage that is acclimatized to acquiesce them to butt timberline branches.

Tails are aswell acclimated for amusing signaling. Some deer breed beam the white base of their cape to acquaint added adjacent deer of accessible danger, and canids (including calm dogs) announce emotions through the accession of their tails. Evolutionary pressures accept led to the development of armored cape in some species, and some, such as the cape of scorpions accommodate venom.

Some breed of lizard can detach ("cast") their cape from their bodies. This can advice them to escape from predators, which are either absent by the wriggling alone tail, or larboard with alone the appendage while the blow of the cadger flees. Cape casting in this address about abound aback over time, admitting the backup is about darker in blush than the original.

The cape of a lot of birds end in continued feathers alleged rectrices. These accoutrement are acclimated as a rudder, allowance the bird to beacon and action in flight; they aswell advice the bird to antithesis while it is perched. In some species—such as birds of paradise and lyrebirds—modified appendage accoutrement play an important role in courtship displays. The extra-stiff appendage accoutrement of added species, including woodpeckers and woodcreepers, acquiesce them to brace themselves durably adjoin timberline trunks.

The cape of agriculture animals, such as the horse is acclimated both to ambit abroad insects, and positioned or confused in means that announce the animal's concrete or affecting state.

Types

A scut is a short, arrect tail. Hares, rabbits, and deer accept scuts.

Human tails

Human embryos accept a appendage that measures about one-sixth of the admeasurement of the antecedent itself.¹ As the antecedent develops into a fetus, the appendage is captivated by the growing body. The adorning appendage is appropriately a human vestigial structure.²³ Infrequently, a adolescent is built-in with a "soft tail", which contains no vertebrae, but alone claret vessels, muscles, and nerves, although there accept been several accurate cases of cape absolute cartilage or up to 5 vertebrae.⁴ Some of these cape may in actuality be sacrococcygeal teratomas. A man called Chandre Oram, who lives in West Bengal, a accompaniment in India, is acclaimed because of his 33-centimetre (13 in) tail. It is not believed to be a accurate tail, however, but rather a case of spina bifida.

Humans accept a "tail bone" (the coccyx) absorbed to the pelvis, in the aforementioned abode which added mammals accept tails. The appendage cartilage is formed of alloyed vertebrae, usually four, at the basal of the vertebral column. It doesn't beetle externally, but retains an anatomical purpose: accouterment an adapter for anatomy like the gluteus maximus.^{citation needed}

Gallery

Scorpion	Pig (Sus domestica)	Glyptodon (Glyptodon asper)	Longhorn cowfish (Lactoria cornuta)
Grévy's Zebra (Equus grevyi)	Polo pony (Equus ferus caballus)	American Alligator (Alligator mississipiensis)	Hippopotamus (Hippopotamus amphibius)