dog physiological characteristics
|about dog, physiological characteristics|
The physical characteristics of the dog allow us to better understand and assess its physiological needs. the dog is a digitigrade species, which means that the animal rests on the ground and moves by walking on its fingers, unlike humans who are plantigrade. The foreleg has four fingers and usually, the hind leg has five. Indeed, the thumb may be missing in some breeds. Where it exists, it does not come into contact with the ground. Each finger is extended by a claw and supported by a plantar pad. The fingers rest on the ground only by their third phalanx.
THE DOG'S SKELETON:
Depending on the breed, the number of bones in the dog's skeleton may vary. On average, there are about 300 bones.
THE DOG'S MUSCULATURE:
It is one of the physiological characteristics of each mammal. The dog has a muscular system that allows it to perform many activities. It can also often achieve sporting performances (hunting dogs, greyhounds...). The chest is wide compared to the narrower abdomen.
THE DOG'S HEAD:
The head has a powerful musculature, capable of applying very strong pressure. That can make the jaw, a weapon by destination. For example, the pressure exerted by the jaw of a German Shepherd is 108 kg/cm2.
THE DOG'S TEETH:
The replacement of milk teeth begins at 4 months of age. The final teeth are finished around 6-7 months. It has 42 teeth (only 28 milk teeth are present before 4 months).
THE WEIGHT OF THE DOG:
Due to the diversity of breeds, the size (weight and size of the dog) can vary greatly from one breed to another. For example, the weight of Chihuahua can be as low as 900 g while that of Mastiff can reach 140 kg.
THE DOG'S LIFE EXPECTANCY:
Life expectancy is a factor to be taken into account in physiological characteristics. The dog has a life expectancy of between 8 and 20 years, an average of 11 years.
BODY TEMPERATURE, RESPIRATORY AND HEART RATE OF THE DOG
The normal body temperature of the dog varies between 38°C and 39°C. Its respiratory rate varies between 16 and 18 movements per minute (18 to 20 in the young, 14 to 16 in the old dog). Its heart rate, objectified by its pulse (taken from the inner thigh), is 90 to 100 beats per minute (110 to 120 in the young, 70 to 80 in the old dog).
This theory challenges the classic hypothesis that the wolf was tamed in several places and at various times. It is based on genetic analysis (using mother-transmitted mitochondrial DNA) in favor of a single origin of the species, in time and space.