All human body is penetrated by nerves which go from a head and spinal cord. They transfer information to human organs, those in turn receive impulses, thanks to the nervous terminations. On skin, for example, their infinite set. And whether internals have the nervous terminations?
Of course, have. Skin, by the way, too human body, the largest of all. And the reason that we can feel touches, this existence of the nervous terminations. Internal bodies "show" us the nervous terminations through pain, it can be both in a stomach, and in intestines, and even in veins. In this case the nervous terminations inflame and transmit to the person a signal of the problem which is available in an organism. Not accidentally in medicine the nervous terminations are called pain receptors, or notsitseptor.
Reproductive organ
And how the situation with a uterus is? It is the reproductive organ of the woman intended for incubation of the child and the more there is a fruit, the uterus stretches stronger. So, at a usual state at the mature woman of reproductive age the uterus has the size of 3.5-4 centimeters. At the woman who is on the ninth month of pregnancy, its size reaches already 36-38 centimeters. If the uterus was penetrated by the nervous terminations, extension in such scales had to bring at least discomfort, and most likely even big pain. But, fortunately, it does not occur, otherwise not only process of childbirth was painful for the woman, but also pregnancy.
Different types of pain
Cold and heat, in fact, are also the reason of pain, only pains peculiar. It is remarkable that in a human body this type of pain is perceived by other notsitseptor as all nervous terminations are divided into different types. So, if we burn the surface of skin with boiled water, then we will feel severe pain, its degree will depend on time of influence and surface area of damage. The uterus does not perceive either high, nor low temperatures. Therefore its cauterization happens without serious consequences.
The only thing that can feel this body is very severe, sharp stretching and a rupture of fabrics which can arise as a result. High degree of tension of a uterus is observed at childbirth. It is penetrated by longitudinal fibers which are reduced to push out the ripened fruit outside. Such reductions very active. This factor, along with the maximum disclosure of a neck of the uterus, is also the main reason that women give birth tormently.
However notsitseptor can be simply active because of small injuries of a uterus, then there is visceral pain. It occurs at some women during painful periods.