In colder regions one clipping can yield as much as 5.4 kg (12 lb).  Hair of highest quality is typically obtained from juvenile or wild camels.  In the ninth or tenth century BC, the dromedary became popular in the Near East. 7.2B) These can often be found within multiple saccules and vary in size from 1-2 cm to 10 cm or more in diameter. , The modern dromedary probably evolved in the hotter, arid regions of western Asia from the Bactrian camel, which in turn was closely related to the earliest Old World camels. Wild dromedaries inhabited arid regions, particularly the Sahara Desert.  The next stage involves training it to respond to reins. , Compared with the Bactrian camel, the dromedary has a lighter build, longer limbs, shorter hairs, a harder palate and an insignificant or absent ethmoidal fissure.  The Cowper's gland is white, almond-shaped and lacks seminal vesicles; the prostate gland is dark yellow, disc-shaped and divided into two lobes.  The age of sexual maturity varies geographically and depends on the individual, as does the reproductive period. The word sensorium in the following pages is designed to express not only the medullary part of the brain, spinal marrow, nerves, organs of sense, and of the muscles; but also at the same time that living principle, or spirit of animation, which resides throughout the body, without being cognizable to our senses, except by its effects. It was much different from curd produced from cow milk, and had a fragile, heterogeneous composition probably composed of casein flakes.  The ancient Greek philosopher Aristotle (4th century BC) was the first to describe the species of Camelus. In 2007, Peng Cui of the Chinese Academy of Sciences and colleagues carried out a phylogenetic study of the evolutionary relationships between the two tribes of Camelidae; Camelini – consisting of the three Camelus species (the study considered the wild Bactrian camel as a subspecies of the Bactrian camel) – and Lamini, which consists of the alpaca (Vicugna pacos), the guanaco (Lama guanicoe), the llama (L. glama) and the vicuña (V. vicugna).  Dromedaries in Somalia may be milked between two and four times a day, while those in Afar, Ethiopia, may be milked up to seven times a day. The distinctive features are its long, curved neck, narrow chest and single hump (the Bactrian camel has two), thick, double-layered eyelashes and bushy eyebrows. These are typically incidental findings. Ultrasonographic identification of the fluid-filled cysts is suggestive but must be differentiated from the cystic bile ducts often seen with fluke infestation. Camelids are foregut fermenters, but the anatomy of the foregut is markedly different from that of other ruminants. The individual's state of hydration and sex and the time of year can influence blood values.  The male has a soft palate (dulaa in Arabic) nearly 18 cm (7.1 in) long, which it inflates to produce a deep pink sac. Tapeworm protoscolices may be identified in aspirates. In severe cases, sodium phosphate may also be given intravenously. Pigmentation of the iris and the fundus is related to coat color, the more heavily pigmented coat colors being associated with brown irides and a darker brown fundus color. The next major group of camels were imported into Australia in 1860, and between 1860 and 1907 10 to 12 thousand were imported. Figure 7.3. Adult males range in height between 1.8 and 2 m (5.9 and 6.6 ft) at the shoulder; females range between 1.7 and 1.9 m (5.6 and 6.2 ft).  Brucellosis is another prominent malady. There is no clear description for the ideal draught camel, though its strength, its ability to survive without water and the flatness of its feet could be indicators. It resembles a long, swollen, pink tongue hanging out of the side of its mouth. According to Richard Bulliet, they can be used for a wide variety of purposes: riding, transport, ploughing, and trading and as a source of milk, meat, wool and leather.