The fallopian tubes are a pair of long, thin tube-like structures on either side of the uterus. From a purely biological point of view, the little romance between men and women in bed is merely the foreplay to a more exciting drama: the happy valley where Mr. Sperm and Ms. Egg meet in passion and become one (fertilization) is in a wider room in the east or west wing of the uterus – the abdomen of the fallopian tubes. The fallopian tube on the wind and water, is the womb’s closest neighbor, but also the most intimate sisters-in-law. The fallopian tubes emanate from the two corners of the uterus (uterine horns), stretching from side to side, and are about the same length or longer (8 cm to 14 cm) than a woman’s middle finger, which is cut like an onion root. The fallopian tube is a hollow organ with a proximal lumen that connects to the uterine cavity and a distal umbilical end that is close to the ovaries. The umbrella end of the fallopian tube is like an open finger (more and thinner of course) and is quite similar to a swimming jellyfish in its state of activity. The magical configuration of the fallopian tube gives it two functions: the first is to act as a red-head, able to gently pick up and deliver the mature egg lady (the female contribution to the primordial human life, the fertilized egg) discharged from the top of the uterus (ovary) into the fallopian tube, where it waits to depart from the male testicles, through the vas deferens, and then through the The female vagina, cervix, uterine cavity and fallopian tubes are not far from the show of affection and attack by Mr. Sperm (the male contributed material in the fertilized egg). Thus, the fallopian tubes naturally have a second function: to provide a rendezvous place for Miss Egg and Mr. Sperm. From the transcendent heights of human reproduction, the sensational entertainment between men and women in bed in the eyes of the common man is merely foreplay for the rendezvous between Mr. Sperm and Ms. Egg, what a big deal. The most common place chosen by Mr. Sperm and Ms. Egg for their rendezvous in the fallopian tube has a special word in anatomy: the abdomen of the jug. As the name implies, this part of the lumen is wide, like the belly of a kettle, and is also relatively long, at 5cm-8cm. You have to say that the Creator really has his own plan. Think about it, Mr. Sperm and Ms. Egg love each other’s passionate moment, is in the five-star hotel presidential suite cool, or in the kindergarten crib comfortable it? However, the Creator has even more plans. At the proximal end of the widest part of the fallopian tube, near the uterus, the tube is divided into two sections, called the “isthmus” and the “interstitial part”, the lumen of which is narrower than the other! This can be interpreted as a toll booth on the sperm journey, a huge test for the sperm gentlemen. If tens or even hundreds of millions of sperm can swarm to the egg lady, the egg lady will be scared to death even if she is not drowned. Therefore, the sperm need to go through all kinds of hardships and dangers, and only the best sperm that are still fit as an ox after a long run may have the chance to show their love to the egg lady. In a way, the isthmus and the interstitial part play the role of a barrier. Under normal circumstances, after the fallopian tube has witnessed the love ritual between Mr. Sperm and Ms. Egg in the abdomen of the fallopian tube (fertilization of the sperm and egg), it rushes the love child (fertilized egg) away as soon as possible and sends it to settle in the endometrium in the uterine cavity. If the fertilized egg is not expelled in time with a firm wall, a big problem can occur – ectopic pregnancy. To deliver the fertilized egg to the uterine cavity in time instead of allowing it to enter the abdominal cavity in the wrong direction, the fallopian tubes need to have special structure and function. The fallopian tubes are composed of 3 layers: the outer layer is the plasma membrane, which is part of the peritoneum like the plasma membrane covering the uterus and intestinal canal; the middle layer is the smooth muscle layer, the contraction of this muscle layer allows the tubes to move like a snake, which can assist in egg pickup, transport of the fertilized egg and to some extent prevent the backflow of menstrual blood and the spread of infection from the uterine cavity to the abdominal cavity; and the inner layer is the mucosal layer, covered by a single layer of columnar epithelium. There are several types of epithelial cells, one of which is called a “ciliated cell”, which has cilia that can wiggle and assist in the transport of the fertilized egg. The lumen of the fallopian tubes is very thin and can easily become blocked by various infections, including tuberculosis. If there is a complete blockage of the fallopian tube in the lumen near the uterus, even if there is a large number of sperm rushing to this area, it will not help, and after a lot of anxiety, they will have to hit the wall; and the egg lady looking through the wall will have to look at her with tears in her eyes, unable to help. When she finally understands that Mr. Sperm does not have the ability to pass through the wall of Laoshan Taoist, she will also die of disappointment. In turn, if the distal lumen of the fallopian tube near the ovary becomes completely blocked, the egg lady cannot reach the fallopian tube as promised, and the sperm gentlemen who have come from far away have to look up and sigh that there is no place for their heroes. All of this can lead to infertility. Fortunately, modern medical technology has been able to bypass this obstruction and allow Mr. Sperm and Ms. Egg to meet not in the traditional rendezvous place, but in a modern glass house (test tube, flat dish), which is generally known as “IVF”. After talking about the fallopian tubes, let’s move on to the ovaries, which are a little further away from the uterus, but have a mother-in-law relationship with their neighbors – the female gonads, that is, the queen who is in charge of the function of the uterus and the rise and fall of the redhead for life.