Jigsaw: The usual friend. » Jigsaw Puzzle game
Jigsaw: The usual friend.
The girl and one are great friends. Do you plead , saying that "..may your play !?
< dog's sense of smell >
The animal that exists in the presence whether it is sense of smell that develops most of dog's senses as known well by the things left behind investigation of the police dog and the victim search of the rescue dog, etc. , and it is the one eaten by the smell judges the enemy or the ally, etc.Moreover, the other party judges the male or the female, etc. from smelling the smell of of which dog territory here, and other party's dogs' hips as the means of communications and sense of smell is used. Therefore, sense of smell is indispensable existence for the dog.
The ability is greatly different from tens of thousands of times from human several thousand it as for dog's sense of smell depending on the kind of the having smell material, and fragrant of the acetic acid etc. can be perceived up to 100 million times human. There are dog's 18?150 square centimeter olfactory epithelium though a human olfactory epithelium is a centimeter by 3?4 square though sense of smell is sensed with the olfactory cell (sense of smell cell) that exists in the olfactory epithelium of the nasal cavity. It is distributed in the mucus layer with which the mucous membrane of the olfactory epithelium is covered, and as for dog's olfactory hair, the numbers are a lot, and are longer than they of other animals though do working that leads the smell to the sensory receptor by the line hair that is called "Olfactory hair". It is presumed numerical layer in the dog it further in the human the layer of the olfactory cell, and for five million humans to exist from three billion 250 million. The blood circulatory system for the nasal cavity develops well, too. The dog has an excellent memory of the smell as the human has a special memory about the face and the voice. It is thought that this does working that searches for the direction of the wind though the part of a no hair that it is always always damp under of the fauna nose including the dog is called "Nasal speculum".