Based on the diversity, it is possible to classify dogs into categories according to their weight and morphology. The breeds are divided into four sub-categories: small (-10 kg), medium (11-25 kg), large (26-45 kg) and giant (-45 kg) (Cavachon puppy). At the other end, the morphological classification has become a bit more complex, though only three subcategories.
The longilineal dogs have elongated and slender forms. Even the coat is similar, since both, with some exceptions, have a double layer of fur. As a marked difference, there is the fact that wolves count on brain and glands that produce hormones heavier since I live in environments that require quick responses to extreme events.
Illustrated in caves and bones found suggest that about 14,000 years dogs have been held up from North Africa, across Eurasia and North America. Dog Cemetery from Svaerdborg in Denmark indicates that European dogs have been valued. Results of genetic studies have so far been contradictory. Vilar, Savolainen et al (1997) concluded that the ancestors of dogs were distinct from wolves about 75,000 to 135,000 years ago. However, the investigation by Savolainen et al (2002) to the conclusion that all dogs should a common origin in the same genome for about 40,000 to 15,000 years ago in East Asia.
Breeding of dogs has led to much diversity in size, appearance and their nature. Variations are numerous and over 800 are recognized by kennel clubs around the world. Many belong to no recognized cultivars. The definition of K9s variant is somewhat unclear. Some kennel clubs define a variant to be a descendant of dogs that are 75 percent the same.
This system is still supported by strong ligaments and tendons. The skull, which has the main function to protect the brain, consists of thirteen bones mend soon after birth and are linked directly to the spine, comprising seven cervical vertebrae, thoracic thirteen seven lumbar, sacral, and three variable number of vertebrae in the tail length. Already the ribcage is formed by ten pairs of ribs attached.
Furthermore, they analyze the source of sound received. Eighteen muscles can rotate and lift the dog's ear. Furthermore, dogs can hear sound four times greater distance than humans. Dogs with pricked ears usually hear better than dogs with drooping ears. They have 220 million smell sensitive cells on the surface area the size of a handkerchief (humans have 5 million cells in an area the size of a postage stamp).
Internally there are noticeable topographies, which are related to the workings and the divisions of internal organs. The thoracic topography is the respiratory system, composed of the nasal cavities, pharynx, forty trainers cartilaginous rings of trachea, bronchi, bronchioles and lungs, alveoli important for vascularization of lungs.
Chest canine is also the cardiovascular system, whose heart has four cavities, has the predominant form of a globe, is located over the left chest and has a size ranging from 120 g to 15 kg, e. This device is still composed of eight other parties. Already in different topography, abdominal, is the digestive tract, with 17 shares, ranging from mouth to tail.
The longilineal dogs have elongated and slender forms. Even the coat is similar, since both, with some exceptions, have a double layer of fur. As a marked difference, there is the fact that wolves count on brain and glands that produce hormones heavier since I live in environments that require quick responses to extreme events.
Illustrated in caves and bones found suggest that about 14,000 years dogs have been held up from North Africa, across Eurasia and North America. Dog Cemetery from Svaerdborg in Denmark indicates that European dogs have been valued. Results of genetic studies have so far been contradictory. Vilar, Savolainen et al (1997) concluded that the ancestors of dogs were distinct from wolves about 75,000 to 135,000 years ago. However, the investigation by Savolainen et al (2002) to the conclusion that all dogs should a common origin in the same genome for about 40,000 to 15,000 years ago in East Asia.
Breeding of dogs has led to much diversity in size, appearance and their nature. Variations are numerous and over 800 are recognized by kennel clubs around the world. Many belong to no recognized cultivars. The definition of K9s variant is somewhat unclear. Some kennel clubs define a variant to be a descendant of dogs that are 75 percent the same.
This system is still supported by strong ligaments and tendons. The skull, which has the main function to protect the brain, consists of thirteen bones mend soon after birth and are linked directly to the spine, comprising seven cervical vertebrae, thoracic thirteen seven lumbar, sacral, and three variable number of vertebrae in the tail length. Already the ribcage is formed by ten pairs of ribs attached.
Furthermore, they analyze the source of sound received. Eighteen muscles can rotate and lift the dog's ear. Furthermore, dogs can hear sound four times greater distance than humans. Dogs with pricked ears usually hear better than dogs with drooping ears. They have 220 million smell sensitive cells on the surface area the size of a handkerchief (humans have 5 million cells in an area the size of a postage stamp).
Internally there are noticeable topographies, which are related to the workings and the divisions of internal organs. The thoracic topography is the respiratory system, composed of the nasal cavities, pharynx, forty trainers cartilaginous rings of trachea, bronchi, bronchioles and lungs, alveoli important for vascularization of lungs.
Chest canine is also the cardiovascular system, whose heart has four cavities, has the predominant form of a globe, is located over the left chest and has a size ranging from 120 g to 15 kg, e. This device is still composed of eight other parties. Already in different topography, abdominal, is the digestive tract, with 17 shares, ranging from mouth to tail.
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