We often see cats turn their mouths, especially when we see food. If a cat has no lips, it usually can't taste. There is a kitten Norris who was born with cleft lip and palate abroad. Because of her lips, eating and drinking are almost difficult, and her beautiful face is destroyed. When Norris was two weeks old, the veterinarian told his owner, Sarra ross, that Norris's lips and chin were severely deformed and needed surgery.
Fortunately, Norris is now almost fully recovered, and Ms. Ross posted this inspiring treatment process on Facebook, which attracted many social media users. Norris has had two lip repairs, and this charming kitten should now be more willing to appear in front of the camera. On Facebook, Norris' homepage has received more than 2,000 likes, and Ms. Ross said that more and more fans should approach it. Ms Ross said: "Every time there is something new about Norris, about 150 people will pay attention to it. Now Norris is like a famous cat. "
In fact, many mammals have the behavior of upturning their lips, such as horses, lions, pandas and so on. And turning up the upper lip is beneficial to transmit the smell to the nose plow, and animals can better feel the smell and pheromone by relying on the nose plow.
The vomeronasal organ may not be familiar to us, because it has degenerated in us humans and some primates, and the structure of the vomeronasal organ can only be seen in fetuses and newborns. But among other terrestrial animals, the nose plough is quite developed.
The vomeronasal organ itself is a particularly inconspicuous organ. For cats, the vomeronasal organ is a pair of small tubes with a length of only about 1cm. One end is closed, and the other end is opened to the upper jaw behind the upper incisors. When the cat flips its lips and flips its tongue, it can better send air to the opening of the nose plough. On the other hand, the closed end of the vomeronasal organ is covered with sensory epithelium and olfactory mucosa, and is connected with the brain through nerves. Therefore, it can be considered that the nose plough is an extra nasal plug.
In the early stage of embryonic development, the vomeronasal organ is gradually formed by the nasal basal plate at the front end of the nerve plate. The vomeronasal organ is a kind of chemoreceptor, which is located in the nasal cavity and is a pair of blind sacs supported by cartilage tissue. It belongs to tubular structure and is divided into two pairs by middle nasal septum. It is the first stop to assist the olfactory system, because the chemical stimulation signal is transmitted through the olfactory bulb, then reaches the amygdala and the bed nucleus of the stria terminalis, and is integrated by the hypothalamus.
The vomeronasal organ of other animals has various shapes, structures and positions, but generally there is only one opening, which contains the blind sac of olfactory mucosa and sensory epithelium.
Although the vomeronasal organ is very small, it plays an important role in enhancing the sense of smell and finding a mate through pheromones. The most developed animal of vomeronasal organ is reptile snake, and vomeronasal organ was first found in snake.
Evidence shows that the vomeronasal organ of mammals can sense the smell of non-volatile substances through sensory neurons. These nonvolatile substances are in direct contact with neurons and receive odors. Some of these nonvolatile substances are pheromones (pheromones are chemical information transmitted between the same species). Some animals can rely on this to detect aggression and mating behavior. For example, a nose plow can be used to detect whether the season is suitable for mating. So in general, it has a high correlation with olfactory system and pheromone.