More than 3,000 years ago an ungainly but useful desert aimal was domesticated
in Arabia. It was the Arabian camel, a long-legged beast withone large hump on
its back. It could cross hot deserts without needing much water, and it could
carry heavy loads without tiring. The two-humped Bactrian camel of central Asia
was also domesticated long ago. It is sturdier than the Arabian and can carry
heavier loads. During the winter, its brownish hair is thick and long for
protection from the cold nights. It sheds is hair in patches in the spring, as
the weather warms up. Camels are hornless hoofed mammals. Their hoofs are like
leathery pads. Their toes spread apart when they walk on sand o snow. Camels are
called”ships of the desert” because they sway from side to side when
they walk and carry loads. Some camels are trained for riding. They kneel to
allow riders to mount. A camel saddle must fit over the large single hump or
between the two smaller humps. A special breed of Arabian camel, the dromedary,
has been developed for riding and racing. It has longer legs and weighs less
than a regular “baggage” camel. It can run at speeds up to 10 miles
per hour. A camel’s hump is a large deposit of fat. The camel’s body uses the
fat as food when plant food is not available during long desert treks. Water is
not stored in the hump. Camels do not sweat so much as other mammals. They store
water in the body tissues and in pouches in the stomach, and use it very slowly.

Tests have shoun that a camel can lose up to a quarter oof its body weight in
fluids, without suffering any ill effects. Camels are still used by nomadic
people of northern Africa and Asia. Camels cary loads where cars and trucks
cannont go. They are also useful for their hides, hair, bones, meat, and milk. a
soft fabric can be woven from their hair. There are camel-like animals in South
Africa. Relatives of the camel are important to the Indians of the Andes. The
llama was domesticated long ago as a beast of burden. The Inca Indians used it
to carry metal ores from mines in the mountains. It has long white or brown
hair. The dark-colored alpaca has even longr hair, which is exported all over
the world adn made into fabric. Teh wool worn by Inca kings was woven from the
very soft, fine hair of the wild vicuna. The guanaco is the tallest of the South
American camel-like animals. The hair of the guanaco is too stiff to be useful.

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